Free SEO Tools: The Complete Guide to What Is Actually Free
187 verified tools · reviewed September 2026
Free SEO tools can help you audit a website, research keywords, check rankings, inspect backlinks, test performance, validate schema and understand how search engines see your pages. The difficult part is knowing what is genuinely free, where the limits start, and which tool fits the job.
We audited the 121 tools from the previous BluCactus guide and rebuilt the directory around 187 tools that provide useful functionality without an expiry date. Temporary trials do not count as free tools.
The short answer
The best free SEO tool depends on the task. Start with first-party tools such as Google Search Console, Google Analytics and Bing Webmaster Tools when they answer the question directly. Add specialist free tools for crawling, keyword research, backlinks, performance, schema, local SEO or AI visibility when you need a deeper view.
Start with the job, not the software
Which free SEO tool do you actually need?
You do not need 187 tools installed or bookmarked. You need the smallest useful stack for the problem in front of you. These are practical starting points, not universal winners.
See how Google sees your own website
Google Search Console
Analyse traffic and user behaviour
Google Analytics
Audit a small website technically
Screaming Frog SEO Spider
Run a quick website check
Seobility SEO Checker
Research keyword demand
Google Keyword Planner + Google Trends
Generate keyword ideas quickly
Ahrefs Keyword Generator
Check page speed and Core Web Vitals
PageSpeed Insights
Validate structured data
Google Rich Results Test
Check backlinks quickly
Ahrefs Backlink Checker
Inspect local search results
BrightLocal Local Search Results Checker
Manage WordPress SEO
Rank Math, Yoast SEO or SEOPress
Inspect a page in the browser
Detailed SEO Extension
Check selected AI-search visibility
Ahrefs, Semrush, SEO.com or Bing AI tools
Choose by evidence
The right free tool is the one that answers the next question.
A crawler, keyword database, backlink checker and performance test can all be useful, but they answer different questions. Start with the decision you need to make, then use the smallest tool stack that gives you credible evidence.
Our inclusion rule
What counts as a free SEO tool?
The word “free” causes a lot of confusion. A product can have a free account, a free utility, a permanent limit or a short trial, and those are not the same thing.
Free
No payment is required for the useful core function.
Permanent free plan
A free account remains available indefinitely, but usage or features are limited.
Freemium
The free part remains useful, while advanced functionality requires payment.
Free standalone utility
A paid vendor offers a separate tool that remains available for free.
What we do not count
A tool also does not make a tactic ethical by itself. The same crawler, keyword tool or backlink checker can support good decisions or poor ones. We use tools inside a sustainable White Hat SEO approach, with the emphasis on helping users and making search systems easier to understand rather than trying to manufacture shortcuts.
How BluCactus evaluated the tools
Facts first, opinion second
BluCactus take: our comments are editorial judgements based on the current free functionality and practical SEO use. Metrics such as Domain Rating, Domain Authority, difficulty scores, traffic estimates and AI-visibility scores remain vendor-specific measurements. They are not Google metrics.
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Jump to a category
Browse 187 free SEO tools by the job they do
CRL · technical SEO crawlers
ON · on-page SEO tools
KW · keyword research tools
SERP · rank checkers and SERP tools
LINK · backlink and authority tools
SPD · website speed and performance tools
SCM · schema and structured-data tools
IDX · robots.txt, sitemap and indexation tools
INTL · international SEO tools
LOC · local SEO tools
WP · WordPress SEO plugins
EXT · SEO browser extensions
CNT · content, question and duplicate-content tools
MON · SEO monitoring and change-detection tools
AI · AI search, AEO and GEO tools
SUITE · SEO tool suites and collections
UTIL · Other useful free SEO utilities
8 tools
Free SEO website checkers and audit tools
If your question is simply “what is wrong with my website?”, start here. These tools run quick checks across common technical, on-page, performance or accessibility signals. They are useful for triage, but an automated score is not the same as a prioritised SEO audit.
Tool 001
SEO Site Checkup
Web
Use SEO Site Checkup when you need help with quick website checks and first-pass SEO diagnostics.
BluCactus take
Fine for a quick snapshot, but not enough for a full-site professional audit.
Main limitation: Free usage is limited (current public access typically around one check/day)
Account: No for basic check
Tool 002
SEORCH
Web
If your immediate task is quick website checks and first-pass SEO diagnostics, SEORCH can be useful.
BluCactus take
Useful as a lightweight second opinion for page-level checks.
Main limitation: Single-page/checker style tool; not a full enterprise crawl platform
Account: No
Tool 003
MetricSpot
Web
MetricSpot focuses on quick website checks and first-pass SEO diagnostics.
BluCactus take
A secondary checker rather than a core recommendation; useful mainly as another perspective.
Main limitation: Current exact data sources and limits should be stated cautiously
Account: Varies
Tool 004
Semrush SEO Checker
Web
If your immediate task is quick website checks and first-pass SEO diagnostics, Semrush SEO Checker can be useful.
BluCactus take
Analyzes on-page, off-page, technical SEO and performance.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 005
Seobility SEO Checker
Web
For quick website checks and first-pass SEO diagnostics, Seobility SEO Checker gives you another free option to consider.
BluCactus take
Good page-level diagnostic with clear recommendations.
Main limitation: Free checker; free account supports 5 checks/day
Account: No for initial tool use / free account for more
Tool 006
SISTRIX SMART
Web
For quick website checks and first-pass SEO diagnostics, SISTRIX SMART gives you another free option to consider.
BluCactus take
Free on-page analysis for smaller use cases.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 007
SEO.com SEO Checker
Web
SEO.com SEO Checker is useful for quick website checks and first-pass SEO diagnostics.
BluCactus take
Quick website health/SEO checker.
Main limitation: Free public tool; result depth varies
Account: No
Tool 008
Bing Webmaster Tools Site Scan
Web
Bing Webmaster Tools Site Scan is useful for quick website checks and first-pass SEO diagnostics.
BluCactus take
A useful first-party crawl/audit feature for Bing, especially because it can surface technical issues beyond Bing-specific ranking data.
Main limitation: Requires verified site; scan limits apply
Account: Yes
Diagnosis before action
A checker can surface an issue. Prioritisation still needs judgement.
A free audit can flag titles, links, speed or indexability. The harder part is deciding which issue affects the site most, what is merely informational, and what should be fixed first.
4 tools
Free technical SEO crawlers
Crawlers move through a website much more like a search bot than a single-page checker does. They can expose broken links, redirect chains, missing metadata, duplicate patterns and crawl-depth problems across many URLs. Free editions are especially useful for smaller sites, learning and bounded audits.
Tool 009
SiteAnalyzer
Desktop / web
Use SiteAnalyzer when you need help with crawling multiple URLs and finding site-wide technical patterns.
BluCactus take
Potentially useful as an alternative crawler, but we would not make it a first recommendation without clearer current free-limit documentation.
Main limitation: Current free limits should be reconfirmed before publishing exact numbers
Account: Varies
Tool 010
Screaming Frog SEO Spider
Desktop
If your immediate task is crawling multiple URLs and finding site-wide technical patterns, Screaming Frog SEO Spider can be useful.
BluCactus take
One of the strongest free technical SEO tools for small sites and learning crawl diagnostics.
Main limitation: Free version crawls up to 500 URLs per crawl; paid licence unlocks advanced features and larger crawls
Account: No
Tool 011
Beam Us Up
Desktop
Beam Us Up is useful for crawling multiple URLs and finding site-wide technical patterns. Free crawler remains available.
BluCactus take
Worth mentioning as a free crawler alternative, but Screaming Frog is the stronger default recommendation for most users.
Main limitation: Legacy-style desktop tool; current maintenance cadence is less clear than Screaming Frog
Account: No
Tool 012
SEO PowerSuite WebSite Auditor
Desktop
SEO PowerSuite WebSite Auditor focuses on crawling multiple URLs and finding site-wide technical patterns.
BluCactus take
A genuine free crawler/audit alternative, though the desktop workflow is heavier than browser checkers.
Main limitation: Permanent free edition with workflow/export limitations
Account: No / optional
21 tools
Free on-page SEO tools
On-page tools help you inspect what is happening on a page or in the browser: headings, redirects, rendered HTML, server responses, mobile behaviour and other implementation details. Use them to investigate a specific problem rather than to chase a generic “SEO score”.
Tool 013
Chrome DevTools
Browser
Use Chrome DevTools when you need help with investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Extremely useful for rendering, network, performance and DOM diagnostics when the user knows what to inspect.
Main limitation: Built into Chrome; requires technical interpretation
Account: No
Tool 014
HEADMasterSEO
Desktop
HEADMasterSEO focuses on investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Very handy for bulk status-code, redirect and header checks on smaller URL sets.
Main limitation: Free edition checks up to 500 URLs
Account: No
Tool 015
Microsoft IIS SEO Toolkit
Windows / IIS
For investigating page-level, rendering, redirect or server behaviour, Microsoft IIS SEO Toolkit gives you another free option to consider. Legacy but Microsoft documentation remains available.
BluCactus take
Keep in a legacy/specialist subsection, not as a mainstream recommendation.
Main limitation: IIS-specific and legacy; useful only in a narrow technical environment
Account: No
Tool 016
WhereGoes
Web
WhereGoes is useful for investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Good lightweight redirect tracer when you do not need a crawler.
Main limitation: Designed for individual redirect-chain checks rather than large crawl sets
Account: No
Tool 017
Seobility Keyword Checker
Web
Seobility Keyword Checker focuses on investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Useful for page/keyword alignment, but avoid treating keyword density as the goal.
Main limitation: Free checker; daily limits apply
Account: No for initial tool use / free account for more
Tool 018
Seobility SEO Compare
Web
Use Seobility SEO Compare when you need help with investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Useful for side-by-side page comparisons.
Main limitation: Free comparison utility; daily limits apply
Account: No for initial tool use / free account for more
Tool 019
Seobility Redirect Checker
Web
Seobility Redirect Checker focuses on investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Helpful for canonical host/protocol redirect checks.
Main limitation: Free utility; daily limits apply
Account: No for initial tool use / free account for more
Tool 020
TechnicalSEO.com .htaccess Tester
Web
TechnicalSEO.com .htaccess Tester focuses on investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Tests .htaccess rules before deployment.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 021
TechnicalSEO.com Fetch & Render
Web
TechnicalSEO.com Fetch & Render is useful for investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Compares fetched/rendered output for technical diagnostics.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 022
TechnicalSEO.com Pre-rendering Tester
Web
TechnicalSEO.com Pre-rendering Tester is useful for investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Checks pre-rendering behavior.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 023
TechnicalSEO.com Mobile-First Index Tool
Web
TechnicalSEO.com Mobile-First Index Tool is useful for investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Helps compare mobile-first indexing signals.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 024
TechnicalSEO.com Mobile-Friendly Test
Web
TechnicalSEO.com Mobile-Friendly Test is useful for investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Current third-party mobile test; distinct from Google’s retired tool.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 025
TechnicalSEO.com Bulk AMP Validator
Web
For investigating page-level, rendering, redirect or server behaviour, TechnicalSEO.com Bulk AMP Validator gives you another free option to consider.
BluCactus take
Bulk-validates AMP where AMP is still in use.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 026
Bing Mobile Friendliness Test
Web
If your immediate task is investigating page-level, rendering, redirect or server behaviour, Bing Mobile Friendliness Test can be useful.
BluCactus take
A current alternative for quick mobile-friendliness checking after Google’s old test was retired.
Main limitation: Public Bing webmaster utility
Account: No
Tool 027
MobileMoxie Page-oscope
Web
If your immediate task is investigating page-level, rendering, redirect or server behaviour, MobileMoxie Page-oscope can be useful.
BluCactus take
Useful for mobile page rendering and technical inspection.
Main limitation: Limited free daily tests
Account: No for limited use
Tool 028
WebFX Links Counter
Web
For investigating page-level, rendering, redirect or server behaviour, WebFX Links Counter gives you another free option to consider.
BluCactus take
Simple page link-count utility.
Main limitation: Free public use
Account: No
Tool 029
WebFX Redirect Checker
Web
WebFX Redirect Checker is useful for investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Quick redirect/status-path check.
Main limitation: Free public use
Account: No
Tool 030
SEOToolSet Single Page Analyzer
Web
If your immediate task is investigating page-level, rendering, redirect or server behaviour, SEOToolSet Single Page Analyzer can be useful.
BluCactus take
Useful for page-level inspection.
Main limitation: No-login free sample; intentionally limited compared with paid suite
Account: No
Tool 031
SEOToolSet SEO Multi-Page Information Tool
Web
SEOToolSet SEO Multi-Page Information Tool is useful for investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Useful for extracting SEO information across multiple pages within free-sample limits.
Main limitation: No-login free sample; intentionally limited compared with paid suite
Account: No
Tool 032
SEOToolSet Check Server Page Tool
Web
If your immediate task is investigating page-level, rendering, redirect or server behaviour, SEOToolSet Check Server Page Tool can be useful.
BluCactus take
Useful for checking server response/header information.
Main limitation: No-login free sample; intentionally limited compared with paid suite
Account: No
Tool 033
SEOToolSet SEO Cloaking Checker
Web
Use SEOToolSet SEO Cloaking Checker when you need help with investigating page-level, rendering, redirect or server behaviour.
BluCactus take
Niche diagnostic for comparing served content.
Main limitation: No-login free sample; intentionally limited compared with paid suite
Account: No
34 tools
Free keyword research tools
Keyword research tools help you discover queries, questions, modifiers and search patterns. They do not all measure the same thing. Some are suggestion engines, some estimate search volume, and some expose first-party search data. Use several sources when the decision matters.
Keyword research is only one part of the wider SEO toolkit. If keyword research is your main task, our dedicated guide goes deeper into free keyword research tools and the differences between suggestion, volume and competitive-research tools.
Tool 034
AnswerThePublic
Web
If your immediate task is discovering and evaluating search queries, AnswerThePublic can be useful.
BluCactus take
Useful for question and intent discovery, but not a replacement for demand data from GKP/GSC.
Main limitation: Limited free searches; paid plans expand usage
Account: May be required for continued use
Tool 035
Keyword Hero
Web
Keyword Hero is useful for discovering and evaluating search queries.
BluCactus take
Niche but genuinely useful for teams that want more keyword attribution context than standard analytics exposes.
Main limitation: Free access is limited; verify current site/page thresholds before publication
Account: Yes
Tool 036
AlsoAsked
Web
For discovering and evaluating search queries, AlsoAsked gives you another free option to consider.
BluCactus take
Strong for mapping follow-up questions and content structure; use alongside demand data rather than treating PAA as search volume.
Main limitation: Limited free searches; paid plans expand volume
Account: Varies by usage
Tool 037
Ahrefs Keyword Generator
Web
Ahrefs Keyword Generator is useful for discovering and evaluating search queries.
BluCactus take
A useful fast idea generator. For India demand decisions, we would still validate important terms with GKP and GSC.
Main limitation: Limited compared with paid Keywords Explorer
Account: No for basic use
Tool 038
Keyword Sheeter
Web
For discovering and evaluating search queries, Keyword Sheeter gives you another free option to consider.
BluCactus take
Useful for generating lots of raw ideas quickly, but the output needs filtering and independent demand validation.
Main limitation: Free keyword generation; richer metrics/exports may require payment
Account: Varies
Tool 039
Google Trends
Web
If your immediate task is discovering and evaluating search queries, Google Trends can be useful.
BluCactus take
Excellent for seasonality, geographic interest and trend direction. Do not treat the index as exact monthly search volume.
Main limitation: Relative trend index, not absolute search-volume data
Account: No
Tool 040
Ubersuggest
Web
Ubersuggest focuses on discovering and evaluating search queries.
BluCactus take
Useful for beginners and quick research, but free limits make it unsuitable as the sole research platform for substantial SEO work.
Main limitation: Free usage is capped; exact daily limits can vary by account/product changes
Account: Optional / limits vary
Tool 041
Google Keyword Planner
Web
If your immediate task is discovering and evaluating search queries, Google Keyword Planner can be useful.
BluCactus take
One of the most useful free sources for market-demand estimates, especially when paired with first-party GSC evidence.
Main limitation: Requires a Google Ads account; volumes are estimates/groupings and may be broad
Account: Yes
Tool 042
WordStream Free Keyword Tool
Web
If your immediate task is discovering and evaluating search queries, WordStream Free Keyword Tool can be useful.
BluCactus take
Useful for quick keyword ideas and commercial context; for organic strategy, validate with Google data and live SERPs.
Main limitation: Designed partly around paid-search data; output/volume depth is limited versus specialist paid suites
Account: No for basic use
Tool 043
Wordtracker
Web
Use Wordtracker when you need help with discovering and evaluating search queries.
BluCactus take
Still relevant historically, but it is no longer a top free recommendation compared with Google/Ahrefs/Semrush options.
Main limitation: Free access is limited; current exact allowances should be checked before publication
Account: Varies
Tool 044
SEO Book Keyword Tool
Web
Use SEO Book Keyword Tool when you need help with discovering and evaluating search queries. Legacy tools remain accessible.
BluCactus take
Include only as a legacy option with a strong freshness caveat; not a primary recommendation.
Main limitation: Tool/data stack is old; some integrations/data sources may be dated
Account: Varies
Tool 045
Soovle
Web
Soovle focuses on discovering and evaluating search queries.
BluCactus take
Excellent for fast cross-platform autocomplete ideation; use other sources to prioritize demand.
Main limitation: Suggestion tool, not a search-volume database
Account: No
Tool 046
KeywordTool.io
Web
KeywordTool.io focuses on discovering and evaluating search queries.
BluCactus take
Good autocomplete-based expansion tool; free mode is strongest for ideas, not prioritization metrics.
Main limitation: Free mode provides suggestions; search-volume/CPC and deeper metrics are paid
Account: No for basic use
Tool 047
SearchVolume.io
Web
SearchVolume.io focuses on discovering and evaluating search queries.
BluCactus take
Potentially useful for quick checks, but we would not prefer it over GKP for India demand decisions.
Main limitation: Current exact data sources/limits should be disclosed carefully
Account: Varies
Tool 048
Niche Laboratory
Web
Use Niche Laboratory when you need help with discovering and evaluating search queries. Still available.
BluCactus take
An interesting niche-discovery tool, but not one we would prioritize for modern evidence-led SEO.
Main limitation: Interface/data methodology is dated compared with modern suites
Account: No
Tool 049
KWFinder
Web
KWFinder focuses on discovering and evaluating search queries.
BluCactus take
A good beginner-friendly keyword tool with a genuinely usable but small free allowance.
Main limitation: Free account is capped (e.g., limited lookups/results per 24 hours); paid plans expand usage
Account: Yes
Tool 050
HyperSuggest
Web
For discovering and evaluating search queries, HyperSuggest gives you another free option to consider.
BluCactus take
Useful for suggestion expansion, but not a preferred demand source.
Main limitation: Free usage is limited; paid credits/plans expand results
Account: Varies
Tool 051
Infinite Suggest
Web
Use Infinite Suggest when you need help with discovering and evaluating search queries. Available through RankTank.
BluCactus take
Fine as a lightweight idea generator, but much weaker than the article’s core recommendations.
Main limitation: Narrow suggestion use case; maintenance/data depth is modest
Account: No
Tool 052
Diagnoseo Merge Words
Web
Use Diagnoseo Merge Words when you need help with discovering and evaluating search queries. Current free replacement for the old generic Merge Words entry.
BluCactus take
Useful for building combinations at scale, but it is a utility, not a research engine.
Main limitation: Simple combinator; no demand metrics
Account: No
Tool 053
Ahrefs Keyword Difficulty Checker
Web / API
If your immediate task is discovering and evaluating search queries, Ahrefs Keyword Difficulty Checker can be useful.
BluCactus take
Fast difficulty estimate, but KD is an Ahrefs metric rather than a Google metric.
Main limitation: Free standalone checker; limited data
Account: Varies by tool
Tool 054
Ahrefs YouTube Keyword Tool
Web / API
If your immediate task is discovering and evaluating search queries, Ahrefs YouTube Keyword Tool can be useful.
BluCactus take
Useful when the SEO job includes YouTube discovery.
Main limitation: Free standalone keyword suggestions
Account: Varies by tool
Tool 055
Ahrefs Amazon Keyword Tool
Web / API
Ahrefs Amazon Keyword Tool is useful for discovering and evaluating search queries.
BluCactus take
Useful for marketplace-search ideation, especially for eCommerce research.
Main limitation: Free standalone keyword suggestions
Account: Varies by tool
Tool 056
Ahrefs Bing Keyword Tool
Web / API
Ahrefs Bing Keyword Tool focuses on discovering and evaluating search queries.
BluCactus take
Useful when Bing demand matters or to diversify query discovery beyond Google.
Main limitation: Free standalone keyword suggestions
Account: Varies by tool
Tool 057
Semrush Keyword Tool
Web
Use Semrush Keyword Tool when you need help with discovering and evaluating search queries.
BluCactus take
Fast no-sign-up keyword discovery.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 058
Semrush Keyword Search Volume Checker
Web
Use Semrush Keyword Search Volume Checker when you need help with discovering and evaluating search queries.
BluCactus take
Quick search-volume lookup; figures are estimates and methodology-dependent.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 059
Semrush Keyword Checker
Web
Semrush Keyword Checker focuses on discovering and evaluating search queries.
BluCactus take
Lightweight keyword analysis without opening the paid suite.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 060
Seobility Keyword Research Tool
Web
Use Seobility Keyword Research Tool when you need help with discovering and evaluating search queries.
BluCactus take
Useful idea and competitor-keyword research with more context than basic autocomplete tools.
Main limitation: Free tool; usage limits apply
Account: No for initial tool use / free account for more
Tool 061
SISTRIX Keyword Tool
Web
If your immediate task is discovering and evaluating search queries, SISTRIX Keyword Tool can be useful.
BluCactus take
Useful lightweight keyword ideation.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 062
SEO.com Keyword Generator
Web
SEO.com Keyword Generator is useful for discovering and evaluating search queries.
BluCactus take
Fast keyword ideation; validate demand separately.
Main limitation: Free public tool; result depth varies
Account: No
Tool 063
SEOToolSet Keyword Suggestion Tool
Web
SEOToolSet Keyword Suggestion Tool is useful for discovering and evaluating search queries.
BluCactus take
Useful lightweight suggestion tool; output depth is intentionally limited.
Main limitation: No-login free sample; intentionally limited compared with paid suite
Account: No
Tool 064
SEOToolSet Search Engine Optimization / KSP Tool
Web
SEOToolSet Search Engine Optimization / KSP Tool focuses on discovering and evaluating search queries.
BluCactus take
A lightweight free sample for page/keyword analysis.
Main limitation: No-login free sample; intentionally limited compared with paid suite
Account: No
Tool 065
SpyFu Free
Web
For discovering and evaluating search queries, SpyFu Free gives you another free option to consider.
BluCactus take
A useful competitive keyword/domain research option when you only need a few lookups.
Main limitation: Free searches are limited in depth; paid plans unlock full data
Account: No for initial lookups / account for more
Tool 066
Moz Keyword Explorer
Web
If your immediate task is discovering and evaluating search queries, Moz Keyword Explorer can be useful.
BluCactus take
Useful secondary keyword dataset; difficulty/volume are Moz-specific estimates.
Main limitation: Free account/query limits apply
Account: Yes
Tool 067
Bing Webmaster Tools Keyword Research
Web
For discovering and evaluating search queries, Bing Webmaster Tools Keyword Research gives you another free option to consider.
BluCactus take
Useful first-party Bing demand data and a good complement to Google-centric research.
Main limitation: Requires account; Bing-specific search-volume/query data
Account: Yes
14 tools
Free rank checkers and SERP tools
Rank checkers answer where a page appears for a query. SERP tools help you inspect what the result page looks like, who else ranks and how a title or description may appear. A spot check is useful, but ongoing SEO decisions should also use Search Console and real page performance.
Tool 068
Ahrefs SERP Checker
Web
Use Ahrefs SERP Checker when you need help with spot-checking rankings and understanding search-result presentation.
BluCactus take
Good for fast SERP inspection and ranking context without opening a full paid platform.
Main limitation: Limited SERP data compared with paid Ahrefs
Account: No for basic use
Tool 069
SERPsim
Web
For spot-checking rankings and understanding search-result presentation, SERPsim gives you another free option to consider.
BluCactus take
Simple and useful for title/meta preview; treat it as a visual check, not a guarantee of how Google will display a result.
Main limitation: Preview only; Google may rewrite snippets and display can vary
Account: No
Tool 070
SERPRobot
Web
SERPRobot focuses on spot-checking rankings and understanding search-result presentation.
BluCactus take
Useful for quick spot checks. For recurring client tracking, the free capacity is too small.
Main limitation: Free checks are limited; paid plans support ongoing scale
Account: Varies
Tool 071
What’s My SERP
Web / extension
What’s My SERP focuses on spot-checking rankings and understanding search-result presentation.
BluCactus take
Useful for quick SERP/rank checks; not a substitute for first-party performance data.
Main limitation: Free checks have usage limits
Account: Varies
Tool 072
Ahrefs Keyword Rank Checker
Web / API
Ahrefs Keyword Rank Checker focuses on spot-checking rankings and understanding search-result presentation.
BluCactus take
Good for fast spot checks without creating a project.
Main limitation: Free standalone checker
Account: Varies by tool
Tool 073
Semrush Keyword Rank Checker
Web
If your immediate task is spot-checking rankings and understanding search-result presentation, Semrush Keyword Rank Checker can be useful.
BluCactus take
Quick public ranking checks.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 074
Semrush SERP Checker
Web
Semrush SERP Checker focuses on spot-checking rankings and understanding search-result presentation.
BluCactus take
Fast SERP inspection.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 075
Semrush Google SERP Simulator
Web
If your immediate task is spot-checking rankings and understanding search-result presentation, Semrush Google SERP Simulator can be useful.
BluCactus take
Useful display preview; Google can still rewrite snippets.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 076
Seobility Ranking Checker
Web
Seobility Ranking Checker focuses on spot-checking rankings and understanding search-result presentation.
BluCactus take
Useful for quick desktop/mobile/local ranking checks.
Main limitation: Free utility; daily limits apply
Account: No for initial tool use / free account for more
Tool 077
Seobility SERP Snippet Generator
Web
Seobility SERP Snippet Generator is useful for spot-checking rankings and understanding search-result presentation.
BluCactus take
Simple and useful pixel-based snippet preview.
Main limitation: Free public utility
Account: No for initial tool use / free account for more
Tool 078
SISTRIX SERP Snippet Generator
Web
SISTRIX SERP Snippet Generator focuses on spot-checking rankings and understanding search-result presentation.
BluCactus take
Preview and optimize title/meta presentation.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 079
TechnicalSEO.com SERP Simulator
Web
For spot-checking rankings and understanding search-result presentation, TechnicalSEO.com SERP Simulator gives you another free option to consider.
BluCactus take
Previews search-result presentation.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 080
WebFX Google Preview Tool
Web
Use WebFX Google Preview Tool when you need help with spot-checking rankings and understanding search-result presentation.
BluCactus take
Useful for previewing titles/descriptions; Google may rewrite live snippets.
Main limitation: Free public use
Account: No
Tool 081
SEO PowerSuite Rank Tracker
Desktop
If your immediate task is spot-checking rankings and understanding search-result presentation, SEO PowerSuite Rank Tracker can be useful.
BluCactus take
A capable free desktop rank/keyword tool for manual work; paid licence matters for ongoing project operations.
Main limitation: Free edition is permanent but has saving/export/automation limitations
Account: No / optional
16 tools
Free backlink and authority tools
Backlink tools can reveal linking pages, broken links and third-party authority estimates. Remember that metrics such as Domain Rating, Domain Authority and Authority Score belong to the vendors that created them. They are not Google metrics and should not be treated as ranking guarantees.
Tool 082
Ahrefs Broken Link Checker
Web
For reviewing backlinks, link issues and third-party authority signals, Ahrefs Broken Link Checker gives you another free option to consider.
BluCactus take
Good for quick external broken-link checks; limited samples make it unsuitable as the only tool for a large remediation project.
Main limitation: Shows a limited sample compared with paid Ahrefs
Account: No for basic use
Tool 083
OpenLinkProfiler
Web
If your immediate task is reviewing backlinks, link issues and third-party authority signals, OpenLinkProfiler can be useful. Current access appears available, but vendor status/history warrants caution.
BluCactus take
Retain only with a clear limitation note; it is not one of our first-choice backlink sources.
Main limitation: Current free limits and data freshness are less transparent than major backlink providers
Account: Yes
Tool 084
Ahrefs Backlink Checker
Web
Ahrefs Backlink Checker focuses on reviewing backlinks, link issues and third-party authority signals.
BluCactus take
Strong quick backlink snapshot, but limited rows mean it should not be treated as a complete link index.
Main limitation: Shows a limited sample compared with paid Ahrefs
Account: No
Tool 085
LinkAssistant
Desktop
LinkAssistant focuses on reviewing backlinks, link issues and third-party authority signals.
BluCactus take
A genuine SEO-specific link workflow tool; useful free for research, with paid tiers needed for heavier operations.
Main limitation: Free edition has workflow/export limitations
Account: No / optional
Tool 086
BrokenLinkCheck.com
Web
For reviewing backlinks, link issues and third-party authority signals, BrokenLinkCheck.com gives you another free option to consider.
BluCactus take
Useful technically, but the licensing/usage caveat must be prominent for business readers.
Main limitation: Terms restrict free use; not suitable as an unrestricted business recommendation
Account: No
Tool 087
Google Disavow Links Tool
Web
For reviewing backlinks, link issues and third-party authority signals, Google Disavow Links Tool gives you another free option to consider.
BluCactus take
Include only with a strong warning. This is not a routine link-cleanup button.
Main limitation: Advanced tool Google says most sites do not need; misuse can harm performance
Account: Yes (verified property)
Tool 088
Xenu Link Sleuth
Windows desktop
For reviewing backlinks, link issues and third-party authority signals, Xenu Link Sleuth gives you another free option to consider. Legacy but still available.
BluCactus take
A historically important free crawler. Include in a legacy/free subsection, not as a modern first recommendation.
Main limitation: Very old Windows software; interface/maintenance is dated
Account: No
Tool 089
Ahrefs Website Authority Checker
Web / API
For reviewing backlinks, link issues and third-party authority signals, Ahrefs Website Authority Checker gives you another free option to consider.
BluCactus take
Convenient comparative metric, but Domain Rating is an Ahrefs score, not a Google ranking factor.
Main limitation: Free standalone checker
Account: Varies by tool
Tool 090
Ahrefs Domain Rating API (free endpoint)
Web / API
For reviewing backlinks, link issues and third-party authority signals, Ahrefs Domain Rating API (free endpoint) gives you another free option to consider.
BluCactus take
Useful for integrations and quick DR lookups; DR remains a vendor metric.
Main limitation: Free API endpoint subject to Ahrefs terms
Account: Varies by tool
Tool 091
Semrush Website Authority Checker
Web
Semrush Website Authority Checker is useful for reviewing backlinks, link issues and third-party authority signals.
BluCactus take
Directional authority benchmarking; authority is a Semrush metric, not a Google metric.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 092
Semrush Backlink Checker
Web
If your immediate task is reviewing backlinks, link issues and third-party authority signals, Semrush Backlink Checker can be useful.
BluCactus take
Quick backlink snapshot with limited free depth.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 093
Seobility Backlink Checker
Web
Use Seobility Backlink Checker when you need help with reviewing backlinks, link issues and third-party authority signals.
BluCactus take
Useful for quick link checks; limited versus full backlink indexes.
Main limitation: Free utility; daily limits apply
Account: No for initial tool use / free account for more
Tool 094
SEO.com Backlink Checker
Web
For reviewing backlinks, link issues and third-party authority signals, SEO.com Backlink Checker gives you another free option to consider.
BluCactus take
Quick backlink snapshot with limited depth.
Main limitation: Free public tool; result depth varies
Account: No
Tool 095
Moz Link Explorer
Web
For reviewing backlinks, link issues and third-party authority signals, Moz Link Explorer gives you another free option to consider.
BluCactus take
A credible backlink option with its own index; compare vendor metrics carefully.
Main limitation: Free queries/data are capped; paid Moz Pro expands access
Account: Yes for deeper access
Tool 096
Majestic Backlink Checker
Web
Majestic Backlink Checker focuses on reviewing backlinks, link issues and third-party authority signals.
BluCactus take
Useful as a second backlink index for quick checks, with strong limits in free mode.
Main limitation: Only a limited amount of backlink data is exposed free
Account: No / account for more
Tool 097
SEO PowerSuite SEO SpyGlass
Desktop
For reviewing backlinks, link issues and third-party authority signals, SEO PowerSuite SEO SpyGlass gives you another free option to consider.
BluCactus take
Useful for link-profile analysis if you accept desktop workflow and free-edition limits.
Main limitation: Permanent free edition with saving/export/automation limits
Account: No / optional
7 tools
Free website speed and performance tools
Performance tools help you diagnose loading, rendering and front-end problems. Lab tests, field data and vendor scores can differ, so use the right evidence for the question. A perfect score is not the objective. A faster, stable and usable site is.
Tool 098
Smush
WordPress plugin
Use Smush when you need help with diagnosing loading, rendering and front-end performance.
BluCactus take
Useful for WordPress image optimization; treat it as performance support rather than a complete SEO solution.
Main limitation: Free version has feature/file-size limits; paid Pro expands capability
Account: No for plugin use
Tool 099
PageSpeed Insights
Web
PageSpeed Insights is useful for diagnosing loading, rendering and front-end performance.
BluCactus take
Essential for performance diagnostics, but interpret CWV and Lighthouse scores in context rather than chasing a decorative 100.
Main limitation: Lab and field data availability differ; performance scores are diagnostic, not Google ranking scores
Account: No
Tool 100
SISTRIX PageSpeed Tool
Web
SISTRIX PageSpeed Tool is useful for diagnosing loading, rendering and front-end performance.
BluCactus take
Useful performance comparison; interpret alongside field/lab context.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 101
Google Lighthouse
Browser / CLI
Google Lighthouse focuses on diagnosing loading, rendering and front-end performance.
BluCactus take
Excellent lab diagnostic for performance, accessibility and best practices; do not confuse Lighthouse scores with direct Google ranking scores.
Main limitation: Available in Chrome DevTools and other interfaces; no monetary limit
Account: No
Tool 102
WebPageTest
Web
Use WebPageTest when you need help with diagnosing loading, rendering and front-end performance.
BluCactus take
Excellent detailed performance testing when PageSpeed Insights is not enough.
Main limitation: Public tests are free; advanced/private/high-volume capabilities may be paid
Account: No for basic tests
Tool 103
Yellow Lab Tools
Web
Use Yellow Lab Tools when you need help with diagnosing loading, rendering and front-end performance.
BluCactus take
Useful for front-end performance and code-quality diagnostics with a different lens from Lighthouse.
Main limitation: Free public test; project availability depends on current service
Account: No
Tool 104
HubSpot Website Grader
Web
HubSpot Website Grader focuses on diagnosing loading, rendering and front-end performance.
BluCactus take
Helpful for a broad beginner-friendly website snapshot, but its score should not be treated as an SEO ranking score.
Main limitation: Free single-site grading/diagnostic; score is HubSpot’s own model
Account: No / optional
5 tools
Free schema and structured-data tools
Structured-data tools help you generate or validate machine-readable markup. Validation does not guarantee a rich result, and schema cannot compensate for weak visible content. Use the markup to describe what is genuinely present on the page.
Tool 105
Google Rich Results Test
Web
Use Google Rich Results Test when you need help with creating or validating structured data and entity markup.
BluCactus take
Essential when implementing Google-supported structured data; pair with Schema.org validation for broader markup checks.
Main limitation: Tests rich-result eligibility/support, not every possible schema quality issue
Account: No
Tool 106
SISTRIX Rich Snippets for Videos
Web
For creating or validating structured data and entity markup, SISTRIX Rich Snippets for Videos gives you another free option to consider.
BluCactus take
Niche utility for video rich-result markup.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 107
TechnicalSEO.com Knowledge Graph Tool
Web
TechnicalSEO.com Knowledge Graph Tool is useful for creating or validating structured data and entity markup.
BluCactus take
Useful for entity/Knowledge Graph investigation.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 108
TechnicalSEO.com Schema Generator
Web
TechnicalSEO.com Schema Generator is useful for creating or validating structured data and entity markup.
BluCactus take
Maintained schema generator; a strong replacement for the old Merkle entry.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 109
Schema.org Validator
Web
Schema.org Validator is useful for creating or validating structured data and entity markup.
BluCactus take
Use alongside Google’s Rich Results Test: broader schema validity versus Google-specific rich-result eligibility.
Main limitation: Validates Schema.org markup; does not tell you whether markup is eligible for Google rich results
Account: No
6 tools
Free robots.txt, sitemap and indexation tools
These tools help you inspect how search systems can discover, crawl and index content. They are useful for robots directives, sitemaps, feeds and URL-level indexation checks. Treat crawling controls carefully because a small technical change can affect large parts of a site.
Tool 110
Ahrefs XML Sitemap Generator
Web / API
If your immediate task is checking discovery, crawling and indexation controls, Ahrefs XML Sitemap Generator can be useful.
BluCactus take
Useful for simple sitemap generation; large/CMS sites should normally use their platform’s maintained sitemap system.
Main limitation: Free standalone utility
Account: Varies by tool
Tool 111
Semrush Sitemap Generator
Web
Semrush Sitemap Generator focuses on checking discovery, crawling and indexation controls.
BluCactus take
Simple sitemap generation for smaller/static use cases.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 112
TechnicalSEO.com robots.txt Tester
Web
For checking discovery, crawling and indexation controls, TechnicalSEO.com robots.txt Tester gives you another free option to consider.
BluCactus take
Tests robots.txt directives.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 113
TechnicalSEO.com Sitemap Generator
Web
For checking discovery, crawling and indexation controls, TechnicalSEO.com Sitemap Generator gives you another free option to consider.
BluCactus take
Generates sitemaps for straightforward use cases.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 114
TechnicalSEO.com RSS Feed Parser
Web
TechnicalSEO.com RSS Feed Parser focuses on checking discovery, crawling and indexation controls.
BluCactus take
Parses RSS feeds for technical inspection.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 115
Google Search Console URL Inspection Tool
Web
Use Google Search Console URL Inspection Tool when you need help with checking discovery, crawling and indexation controls.
BluCactus take
A distinct high-value Search Console workflow for checking indexed/crawled status and requesting indexing; count separately because it has a discrete operational job.
Main limitation: Requires verified property; quota/inspection limits apply
Account: Yes
4 tools
Free international SEO tools
International SEO introduces language, regional targeting and hreflang decisions that are easy to get wrong at scale. These free utilities help generate or validate hreflang and locale behaviour, but the architecture still needs a clear market and URL strategy.
The tool can only support the implementation. The market and URL structure still need a clear strategy. For the broader problem, see our guide to international and local SEO.
Tool 116
SISTRIX hreflang Checker
Web
Use SISTRIX hreflang Checker when you need help with checking hreflang and international search implementation.
BluCactus take
Good for cross-checking language/region annotations.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 117
SISTRIX hreflang Generator
Web
Use SISTRIX hreflang Generator when you need help with checking hreflang and international search implementation.
BluCactus take
Useful for generating hreflang markup cleanly.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 118
TechnicalSEO.com hreflang Tags Tester
Web
For checking hreflang and international search implementation, TechnicalSEO.com hreflang Tags Tester gives you another free option to consider.
BluCactus take
Tests hreflang implementation.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 119
TechnicalSEO.com Locale-Adaptive Tester
Web
Use TechnicalSEO.com Locale-Adaptive Tester when you need help with checking hreflang and international search implementation.
BluCactus take
Tests locale-adaptive page behavior.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
8 tools
Free local SEO tools
Local SEO tools help you inspect geographically different search results, review workflows, Google Business Profile activity and local volatility. A national SERP can hide what a customer sees in a particular city, so location-aware checks can be valuable.
Local tools are most useful when the business genuinely depends on local discovery. They should support, not replace, a location strategy that reflects where and how the company actually sells.
Tool 120
Google Business Profile
Web / mobile
Use Google Business Profile when you need help with reviewing local search visibility and location-specific SEO tasks.
BluCactus take
Core free local-search asset for eligible businesses; the article should use the current product name.
Main limitation: For eligible businesses; profile features depend on business/category/region
Account: Yes
Tool 121
BrightLocal Local Search Results Checker
Web
Use BrightLocal Local Search Results Checker when you need help with reviewing local search visibility and location-specific SEO tasks.
BluCactus take
Very useful for checking location-specific Google results without pretending a national SERP represents local reality.
Main limitation: Free daily usage is limited
Account: No for basic checks
Tool 122
Whitespark Google Review Link Generator
Web
Whitespark Google Review Link Generator focuses on reviewing local search visibility and location-specific SEO tasks.
BluCactus take
A small but genuinely useful local SEO utility for reducing review-request friction.
Main limitation: Specific utility for generating review links; not a broader local SEO suite
Account: No
Tool 123
TechnicalSEO.com Local Search Tool
Web
Use TechnicalSEO.com Local Search Tool when you need help with reviewing local search visibility and location-specific SEO tasks.
BluCactus take
Runs localized search checks.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 124
TechnicalSEO.com Review Link Generator
Web
If your immediate task is reviewing local search visibility and location-specific SEO tasks, TechnicalSEO.com Review Link Generator can be useful.
BluCactus take
Generates review links.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 125
BrightLocal Local RankFlux
Web
BrightLocal Local RankFlux is useful for reviewing local search visibility and location-specific SEO tasks.
BluCactus take
Useful for monitoring volatility in local search results; not proof that one business was hit by an update.
Main limitation: Free public use; practical query limits may apply
Account: No
Tool 126
BrightLocal Google Review Link & Place ID Generator
Web
For reviewing local search visibility and location-specific SEO tasks, BrightLocal Google Review Link & Place ID Generator gives you another free option to consider.
BluCactus take
Useful small utility for review workflows and Place ID lookup.
Main limitation: Free public use; practical query limits may apply
Account: No
Tool 127
MobileMoxie SERPerator
Web
Use MobileMoxie SERPerator when you need help with reviewing local search visibility and location-specific SEO tasks.
BluCactus take
Useful for mobile/local SERP emulation across devices and locations.
Main limitation: Limited free daily tests
Account: No for limited use
6 tools
Free WordPress SEO plugins
WordPress plugins can handle metadata, XML sitemaps, schema, canonicals and other site-level SEO tasks. The free versions below are useful, but installing several SEO plugins at once can create conflicts. Choose one primary plugin and understand what it changes.
For online stores, platform-specific SEO can quickly extend beyond plugin settings. Our broader eCommerce SEO services cover catalogue architecture, products, collections, crawling, internal linking and content ownership.
Tool 128
Rank Math SEO
WordPress plugin
If your immediate task is managing core SEO settings inside WordPress, Rank Math SEO can be useful.
BluCactus take
One of the strongest free WordPress SEO plugins, especially for schema and site-level controls.
Main limitation: Some advanced modules/data require Pro or separate services
Account: Optional for some features
Tool 129
Yoast SEO
WordPress plugin
Use Yoast SEO when you need help with managing core SEO settings inside WordPress.
BluCactus take
A mature free WordPress SEO baseline with metadata, sitemaps, schema and content/readability guidance.
Main limitation: Core plugin is free; vendor-specific premium/add-ons may exist
Account: No for core plugin
Tool 130
SEOPress Free
WordPress plugin
SEOPress Free is useful for managing core SEO settings inside WordPress.
BluCactus take
A strong free alternative with broad site-level SEO controls and current AI/agent-readiness features.
Main limitation: Core plugin is free; vendor-specific premium/add-ons may exist
Account: No for core plugin
Tool 131
The SEO Framework
WordPress plugin
If your immediate task is managing core SEO settings inside WordPress, The SEO Framework can be useful.
BluCactus take
A lightweight, privacy-conscious free SEO plugin with a deliberately less sales-heavy core.
Main limitation: Core plugin is free; vendor-specific premium/add-ons may exist
Account: No for core plugin
Tool 132
SmartCrawl
WordPress plugin
Use SmartCrawl when you need help with managing core SEO settings inside WordPress.
BluCactus take
A usable free WordPress SEO option for metadata, sitemaps and content analysis.
Main limitation: Core plugin is free; vendor-specific premium/add-ons may exist
Account: No for core plugin
Tool 133
Slim SEO
WordPress plugin
Use Slim SEO when you need help with managing core SEO settings inside WordPress.
BluCactus take
A lightweight automation-first WordPress SEO plugin worth including for users who want fewer settings.
Main limitation: Core plugin is free; vendor-specific premium/add-ons may exist
Account: No for core plugin
11 tools
Free SEO browser extensions
Browser extensions are excellent when you need fast answers while reviewing a live page or SERP. They can expose headings, canonicals, indexability, schema, links, authority metrics and ranking information without opening a large platform.
Tool 134
Ahrefs SEO Toolbar
Browser extension
For inspecting pages and SERPs without leaving the browser, Ahrefs SEO Toolbar gives you another free option to consider.
BluCactus take
One of the better free browser extensions for fast on-page and indexability checks.
Main limitation: Free toolbar shows DR/UR plus on-page/indexability functions; paid tiers add broader metrics
Account: Yes for metrics
Tool 135
View Rendered Source
Browser extension
Use View Rendered Source when you need help with inspecting pages and SERPs without leaving the browser.
BluCactus take
Simple and useful for comparing raw source with rendered DOM, especially on JavaScript-heavy sites.
Main limitation: Extension-based page comparison; not a full crawler
Account: No
Tool 136
SEOquake
Browser extension
Use SEOquake when you need help with inspecting pages and SERPs without leaving the browser.
BluCactus take
A mature free extension for page-level checks and SERP overlays; still useful despite overlap with newer extensions.
Main limitation: Some linked Semrush data/features may have separate limits
Account: No for core extension
Tool 137
FatRank
Browser extension
For inspecting pages and SERPs without leaving the browser, FatRank gives you another free option to consider.
BluCactus take
Convenient for spot-checking rankings directly in the browser.
Main limitation: Designed for quick checks, not enterprise-scale tracking
Account: No / optional
Tool 138
MozBar
Browser extension
If your immediate task is inspecting pages and SERPs without leaving the browser, MozBar can be useful.
BluCactus take
Still handy for quick page/SERP metrics, but remember Moz authority scores are vendor metrics, not Google metrics.
Main limitation: Some metrics/features require Moz account/paid plan
Account: Yes for some data
Tool 139
Keyword Surfer
Browser extension
Use Keyword Surfer when you need help with inspecting pages and SERPs without leaving the browser.
BluCactus take
A convenient lightweight SERP research extension, especially for quick ideation.
Main limitation: Browser/SERP estimates; not a substitute for first-party or Planner data
Account: No / optional
Tool 140
Detailed SEO Extension
Browser extension
Use Detailed SEO Extension when you need help with inspecting pages and SERPs without leaving the browser.
BluCactus take
One of the strongest free browser extensions for working SEOs: fast headings, canonicals, robots, schema, hreflang and link inspection.
Main limitation: Core/free functionality varies; paid credits/features may expand data
Account: Varies
Tool 141
SEO META in 1 CLICK
Browser extension
Use SEO META in 1 CLICK when you need help with inspecting pages and SERPs without leaving the browser.
BluCactus take
Fast page-level metadata and heading inspection; simple and practical.
Main limitation: Core/free functionality varies; paid credits/features may expand data
Account: Varies
Tool 142
SEO Pro Extension
Browser extension
SEO Pro Extension is useful for inspecting pages and SERPs without leaving the browser.
BluCactus take
Useful browser-based extraction of key on-page SEO elements.
Main limitation: Core/free functionality varies; paid credits/features may expand data
Account: Varies
Tool 143
Keywords Everywhere
Browser extension
For inspecting pages and SERPs without leaving the browser, Keywords Everywhere gives you another free option to consider.
BluCactus take
Free features are now useful for SERP/keyword ideation; paid credits unlock deeper volume/competition data.
Main limitation: Core/free functionality varies; paid credits/features may expand data
Account: Varies
Tool 144
Majestic Backlink Analyzer browser extension
Browser extension
Use Majestic Backlink Analyzer browser extension when you need help with inspecting pages and SERPs without leaving the browser.
BluCactus take
Useful for quick Majestic metrics in-browser, with the same vendor-metric caveat.
Main limitation: Free metrics/data are limited; account may expand access
Account: Varies
8 tools
Free content, question and duplicate-content tools
These tools can help you discover questions, inspect repeated content, check readability or generate ideas. Use them as research aids rather than as automatic judges of content quality. Helpful content still depends on intent, experience, accuracy and editorial judgement.
Tool 145
Copyscape
Web
Use Copyscape when you need help with content research, question discovery and duplicate-content checks.
BluCactus take
Still useful for checking obvious web copies of published pages; it is not a comprehensive content-quality evaluator.
Main limitation: Free checks are limited compared with Premium/API
Account: No for basic search
Tool 146
Siteliner
Web
If your immediate task is content research, question discovery and duplicate-content checks, Siteliner can be useful.
BluCactus take
Useful for quickly surfacing internal duplicate-content patterns on smaller sites.
Main limitation: Free service scans up to a limited number of pages; premium expands access
Account: No
Tool 147
FAQFox
Web
FAQFox focuses on content research, question discovery and duplicate-content checks.
BluCactus take
Useful for discovering real question patterns, but it needs demand and intent validation before becoming a content plan.
Main limitation: Idea discovery only; source coverage varies
Account: No
Tool 148
QuestionDB
Web
QuestionDB is useful for content research, question discovery and duplicate-content checks.
BluCactus take
Good for question discovery; combine with actual search-demand evidence.
Main limitation: Free plan has a small monthly search allowance
Account: Varies
Tool 149
Semrush Plagiarism Checker
Web
Semrush Plagiarism Checker focuses on content research, question discovery and duplicate-content checks.
BluCactus take
Useful content originality check within its free limits.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 150
Seobility TF*IDF Tool
Web
Use Seobility TF*IDF Tool when you need help with content research, question discovery and duplicate-content checks.
BluCactus take
Can help inspect terminology used by ranking pages, but should not drive mechanical term stuffing.
Main limitation: Free tool; usage limits apply
Account: No for initial tool use / free account for more
Tool 151
WebFX Readability Test Tool
Web
WebFX Readability Test Tool is useful for content research, question discovery and duplicate-content checks.
BluCactus take
Useful as one readability signal; readability score is not SEO quality by itself.
Main limitation: Free public use
Account: No
Tool 152
WebFX Blog Post Idea Generator
Web
For content research, question discovery and duplicate-content checks, WebFX Blog Post Idea Generator gives you another free option to consider.
BluCactus take
Useful brainstorming utility, but ideas still need intent/demand/ownership validation.
Main limitation: Free public use
Account: No
7 tools
Free SEO monitoring and change-detection tools
Search results, pages and algorithms change. Monitoring tools can alert you to movement, page changes or broad volatility. They are context tools, not diagnosis engines. A spike in volatility does not prove why one site gained or lost visibility.
Tool 153
Google Alerts
Web / email
Use Google Alerts when you need help with monitoring search changes, mentions and volatility.
BluCactus take
Still useful for lightweight brand, competitor and topic monitoring, although it is not a full SEO monitoring platform.
Main limitation: Alert coverage and timing are not guaranteed to be exhaustive
Account: Yes
Tool 154
Algoroo
Web
Algoroo focuses on monitoring search changes, mentions and volatility.
BluCactus take
Useful as a contextual volatility signal. Never diagnose a traffic change from Algoroo alone.
Main limitation: Volatility is an aggregate signal, not proof that a specific site was affected by an update
Account: No
Tool 155
Panguin Tool
Web
If your immediate task is monitoring search changes, mentions and volatility, Panguin Tool can be useful.
BluCactus take
Useful for hypothesis generation around traffic shifts, but never label a decline an algorithm penalty from this tool alone.
Main limitation: Correlates traffic patterns with known update dates; correlation is not proof of causation
Account: Yes (analytics access)
Tool 156
Ahrefs Website Change Monitor
Web / API
Use Ahrefs Website Change Monitor when you need help with monitoring search changes, mentions and volatility.
BluCactus take
Useful for detecting page changes that may explain SEO movement.
Main limitation: Free utility; current public limits apply
Account: Varies by tool
Tool 157
SISTRIX Google Update Radar
Web
Use SISTRIX Google Update Radar when you need help with monitoring search changes, mentions and volatility.
BluCactus take
Useful context for market-level volatility, not site-specific causation.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 158
SISTRIX Google Update Check
Web
For monitoring search changes, mentions and volatility, SISTRIX Google Update Check gives you another free option to consider.
BluCactus take
Checks domain visibility changes around known updates; correlation is not causation.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 159
Google Refresh Outdated Content tool
Web
Google Refresh Outdated Content tool is useful for monitoring search changes, mentions and volatility.
BluCactus take
Useful for a very specific search-result freshness/removal job; not a content-refresh planning tool.
Main limitation: Designed for requesting refresh/removal of outdated cached/search-result content in specific circumstances
Account: Yes
9 tools
Free AI search, AEO and GEO tools
AI-mediated search now creates new questions about citations, mentions, crawler access and visibility across AI answers. These tools can help you inspect parts of that environment, but their coverage and scoring methods vary. No tool can guarantee a citation or recommendation.
Important: these tools are useful for observation, not guarantees. An AI visibility score cannot promise mentions, citations, recommendations or referral traffic. The useful question is what the tool can actually observe and how that evidence changes your next decision.
Tool 160
Ahrefs AI Visibility Checker
Web / API
If your immediate task is checking selected AI-search visibility, citations or crawler access, Ahrefs AI Visibility Checker can be useful.
BluCactus take
Useful for a quick brand-presence snapshot across AI platforms, but any AI visibility score is tool-specific.
Main limitation: Free standalone checker; current public limits apply
Account: Varies by tool
Tool 161
Ahrefs AI Mode Tracker
Web / API
If your immediate task is checking selected AI-search visibility, citations or crawler access, Ahrefs AI Mode Tracker can be useful.
BluCactus take
Useful for monitoring Google AI Mode mentions/citations at a lightweight level.
Main limitation: Free standalone tracker; public limits apply
Account: Varies by tool
Tool 162
Ahrefs AI Overviews Tracker
Web / API
Use Ahrefs AI Overviews Tracker when you need help with checking selected AI-search visibility, citations or crawler access.
BluCactus take
Useful for checking AI Overview visibility and citations; do not treat it as guaranteed coverage of every query.
Main limitation: Free standalone tracker; public limits apply
Account: Varies by tool
Tool 163
Semrush AI Search Visibility Checker
Web
Semrush AI Search Visibility Checker focuses on checking selected AI-search visibility, citations or crawler access.
BluCactus take
Useful directional snapshot of brand visibility in AI search.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 164
Semrush AI Overviews Visibility Checker
Web
Semrush AI Overviews Visibility Checker focuses on checking selected AI-search visibility, citations or crawler access.
BluCactus take
Checks presence/visibility around Google AI Overviews.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 165
Semrush AI Traffic Checker
Web
If your immediate task is checking selected AI-search visibility, citations or crawler access, Semrush AI Traffic Checker can be useful.
BluCactus take
Estimates AI-referred traffic; treat as an estimate rather than first-party analytics.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 166
TechnicalSEO.com AI Bot Access Tester
Web
For checking selected AI-search visibility, citations or crawler access, TechnicalSEO.com AI Bot Access Tester gives you another free option to consider.
BluCactus take
Checks how AI bots are allowed/blocked by site rules.
Main limitation: Free browser-based utility; some tools have practical input/processing limits
Account: No
Tool 167
SEO.com AI Overview Checker
Web
For checking selected AI-search visibility, citations or crawler access, SEO.com AI Overview Checker gives you another free option to consider.
BluCactus take
Useful for checking AI Overview presence around queries.
Main limitation: Free public tool; result depth varies
Account: No
Tool 168
Bing Webmaster Tools AI Performance
Web
Use Bing Webmaster Tools AI Performance when you need help with checking selected AI-search visibility, citations or crawler access.
BluCactus take
One of the most interesting free first-party AI-visibility sources because it reports citations/pages across Microsoft AI experiences.
Main limitation: Requires verified site; reports supported Microsoft AI surfaces
Account: Yes
New search systems, same discipline
AI-search visibility needs evidence, not a decorative score.
Different tools observe different AI surfaces, queries and citation patterns. Use them to identify questions worth investigating, then connect the findings back to crawlability, entities, content quality and first-party business evidence.
4 tools
Free SEO tool suites and collections
Some vendors bundle several free functions into one account or one large toolbox. We count the suite when it behaves like a single working environment, and we avoid inflating the list by counting every tiny calculator or report as a separate product.
Tool 169
Ahrefs Free
Web
Ahrefs Free focuses on combining several SEO jobs inside one free environment.
BluCactus take
A very strong free account for sites you own. The verification requirement makes it different from public competitor-research tools.
Main limitation: Site Explorer: 1,000 backlinks & keywords visible at once; Site Audit: 5,000 crawl credits/month/project; Web Analytics: up to 1M events/project; AI Content Helper: 1 doc/month
Account: Yes; site verification required for some tools
Tool 170
Seobility Basic
Web
Seobility Basic focuses on combining several SEO jobs inside one free environment.
BluCactus take
A credible small-site all-in-one free plan; limits become restrictive on larger sites.
Main limitation: 1 project/domain; 100 pages per crawl; 10 keywords for ranking monitoring
Account: Yes
Tool 171
SmallSEOTools SEO tool suite
Web
If your immediate task is combining several SEO jobs inside one free environment, SmallSEOTools SEO tool suite can be useful.
BluCactus take
Broad coverage and useful for occasional one-off tasks, but quality/data sources vary by utility. Group it rather than counting dozens of micro-tools separately.
Main limitation: Many separate micro-tools; grouped as one directory entry to avoid artificial count inflation
Account: No for many tools
Tool 172
Internet Marketing Ninjas Free SEO Tools
Web
Use Internet Marketing Ninjas Free SEO Tools when you need help with combining several SEO jobs inside one free environment.
BluCactus take
A useful legacy-rich toolbox for one-off checks; group the suite instead of treating every micro-tool as a separate recommendation.
Main limitation: Multiple individual utilities; grouped as one entry to avoid inflating the headline count
Account: No
15 tools
Other useful free SEO utilities
Not every useful SEO tool fits neatly into one category. Reporting, analytics, archived pages, competitor estimates and first-party webmaster platforms can all support better decisions when used for the job they were built to do.
Tool 173
Google Data Studio
Web
Google Data Studio focuses on supporting SEO research, measurement and competitive investigation.
BluCactus take
Excellent for combining GSC, Analytics and other SEO data into recurring reports; the value depends on the quality of the underlying sources.
Main limitation: No normal per-report fee; connected data sources may have their own limits/costs
Account: Yes
Tool 174
Wayback Machine
Web
For supporting SEO research, measurement and competitive investigation, Wayback Machine gives you another free option to consider.
BluCactus take
Very useful for diagnosing migrations, deleted pages, historical messaging and old URL structures.
Main limitation: Public archive availability varies by URL/date
Account: No
Tool 175
Google Analytics
Web
Google Analytics is useful for supporting SEO research, measurement and competitive investigation.
BluCactus take
Core measurement infrastructure. It does not replace Search Console for query/ranking evidence.
Main limitation: Standard product is free; enterprise Analytics 360 is separate
Account: Yes
Tool 176
Google Search Console
Web
Google Search Console is useful for supporting SEO research, measurement and competitive investigation.
BluCactus take
One of the most important free SEO tools because it provides first-party Google query, page, indexing and technical signals.
Main limitation: Data is for verified properties and subject to Google’s reporting limits
Account: Yes
Tool 177
Bing Webmaster Tools
Web
For supporting SEO research, measurement and competitive investigation, Bing Webmaster Tools gives you another free option to consider.
BluCactus take
A core first-party tool that is underused compared with Search Console, especially now that Bing includes AI-performance reporting.
Main limitation: Requires verified site ownership; reports are Bing/Microsoft-specific
Account: Yes
Tool 178
Ahrefs Website Traffic Checker
Web / API
If your immediate task is supporting SEO research, measurement and competitive investigation, Ahrefs Website Traffic Checker can be useful.
BluCactus take
Useful for directional competitor research; never substitute estimates for real analytics/GSC when you own the site.
Main limitation: Free standalone checker; estimated traffic
Account: Varies by tool
Tool 179
Semrush Website Traffic Checker
Web
Semrush Website Traffic Checker focuses on supporting SEO research, measurement and competitive investigation.
BluCactus take
Directional competitor traffic estimates.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 180
Semrush Competitor Finder
Web
Use Semrush Competitor Finder when you need help with supporting SEO research, measurement and competitive investigation.
BluCactus take
Fast competitor discovery; validate real business/search competitors before acting.
Main limitation: Free public utility; specific result/usage limits vary by tool
Account: No
Tool 181
SISTRIX Visibility Index Check
Web
SISTRIX Visibility Index Check is useful for supporting SEO research, measurement and competitive investigation.
BluCactus take
Useful for directional SISTRIX visibility; it is a vendor-specific metric.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 182
Ask SISTRIX
Web
Ask SISTRIX focuses on supporting SEO research, measurement and competitive investigation.
BluCactus take
Useful explanatory assistant/resource, but less directly diagnostic than the other tools.
Main limitation: Always-available free tool; individual data depth varies
Account: No
Tool 183
MobileMoxie App Rankalyzer
Web
If your immediate task is supporting SEO research, measurement and competitive investigation, MobileMoxie App Rankalyzer can be useful.
BluCactus take
Niche but useful for app-store ranking research.
Main limitation: Limited free daily tests
Account: No for limited use
Tool 184
SEO.com Domain Overview
Web
SEO.com Domain Overview focuses on supporting SEO research, measurement and competitive investigation.
BluCactus take
Quick domain-level overview for directional research.
Main limitation: Free public tool; result depth varies
Account: No
Tool 185
SEO.com Traffic Checker
Web
SEO.com Traffic Checker focuses on supporting SEO research, measurement and competitive investigation.
BluCactus take
Estimated traffic for competitor research, not a substitute for first-party analytics.
Main limitation: Free public tool; result depth varies
Account: No
Tool 186
Moz Domain Analysis
Web
Moz Domain Analysis is useful for supporting SEO research, measurement and competitive investigation.
BluCactus take
Useful directional domain overview; Domain Authority is a Moz metric, not a Google metric.
Main limitation: Free query/data limits apply
Account: Varies
Tool 187
Majestic Million
Web
Use Majestic Million when you need help with supporting SEO research, measurement and competitive investigation.
BluCactus take
Interesting for comparative research and prospecting, but not a search-engine ranking list.
Main limitation: Ranks one million domains by Majestic link data; not a Google ranking
Account: No
Start with first-party evidence
Free SEO tools from Google and Bing
When Google or Bing provides direct data about your verified site, start there before reaching for an estimated traffic or authority score.
Microsoft Bing
Important exclusions
Popular SEO tools we do not count as free
A familiar brand name does not automatically belong in a free-tools directory. We removed trial-only products, retired tools and products whose current free access does not meet the permanent-free rule.
WooRank
Trial. Temporary trial rather than permanent free tier
SE Ranking
14-day trial. Temporary trial rather than permanent free tier
Raven Tools
7-day trial. Temporary trial only
cognitiveSEO
Trial. Temporary trial rather than permanent free tier
URL Profiler
Trial. Temporary trial rather than permanent free tier
XOVI
Trial. Commercial platform/trial rather than permanent free tier
Surfer SEO
Paid / trial-led platform. Full platform does not meet the permanent-free inclusion rule
Whitespark Local Citation Finder
Paid product. Current product is commercial rather than a permanent free tool
Lumar (formerly DeepCrawl)
Commercial / legacy trial claim. Old DeepCrawl ‘freemium’ description no longer reflects current product
GTmetrix
Time-limited free allowance. Current Basic free testing allowance is time-limited rather than a durable permanent-free SEO tier
Google Mobile-Friendly Test
Retired. Retired December 1, 2023
Alexa Rank
Retired. Alexa Internet service was retired
SEOprofiler
Retired. Service closed
Jaaxy
Starter trial. Temporary/limited trial does not satisfy permanent-free rule
Freshness matters
What changed since our previous free SEO tools guide?
The previous version listed 121 tools. We audited every legacy entry before rebuilding the guide. Some products disappeared. Others changed names, became paid-only, moved to trial access or were duplicated. New categories also emerged.
Google My Business: Now Google Business Profile.
Ahrefs Webmaster Tools: Now represented by the broader Ahrefs Free account.
Google Mobile-Friendly Test: Retired and no longer counted.
DeepCrawl: Became Lumar and no longer qualifies as a genuinely free tool under this methodology.
Open Site Explorer: Replaced by the current Moz Link Explorer.
AI visibility tools: A new 2026 category that did not meaningfully exist when the original guide was written.
Build a small working stack
Which free SEO tools should you actually use?
The directory is comprehensive, but your working stack should be small. Start with the tools that answer your current question, then add another data source only when it changes the decision.
Beginner website owner
Content and SEO writer
Technical SEO starter
Local business
SEO freelancer
eCommerce or Shopify store
Free tools can expose catalogue, crawling, performance and structured-data issues, but the platform can create implementation questions generic checkers do not solve.
Explore eCommerce SEO services, dedicated Shopify SEO services, and our specialist Fashion SEO service where relevant.
Where free reaches its limit
When free SEO tools are no longer enough
Free tools can take you surprisingly far. The limit usually appears when the site, dataset or decision becomes too large for the free allowance, or when the real problem is not access to data but knowing what to prioritise.
A free tool can show a broken link, a slow template, an indexing problem or a keyword opportunity. It cannot automatically decide which page should own an intent, whether a new page is necessary, whether two pages should be consolidated, or how a technical recommendation fits the commercial priorities of the business.
If you need help turning Search Console, crawl, keyword, content and competitive evidence into priorities, explore BluCactus SEO services in India.
Key takeaway
The useful tool is the one that changes your next decision
A large SEO stack can create more dashboards without creating more clarity. Start with the question you need to answer. Use first-party data when it is available. Add a specialist tool when it reveals something you could not see before. Then decide what action the evidence actually supports.
The number will change as products are launched, renamed, restricted or retired. The important thing is keeping the directory useful and being clear about what is really free.
From tool data to an SEO decision
Have the tools, but not the SEO plan?
Share the website, the evidence you already have and the decision you are trying to make. BluCactus can help turn Search Console, crawl, keyword and content evidence into practical priorities.
Talk to BluCactus
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Useful first. Free tools can reveal data. Strategy decides what to do with it.
LinkedIn
Great tools. I didn’t know that there were so many free SEO tools.
Your writing is like a breath of fresh air in the often stale world of online content. Your unique perspective and engaging style set you apart from the crowd. Thank you for sharing these free tools with us.