Free SEO Tools
36 free tools — audit, crawl, rank tracking, backlinks and AI visibility — each running a real check against a live URL, with no signup. Below the directory: which one to run first, and why the order matters more than the list.
Which free SEO tool should you run first?
Start with the sitemap, then robots.txt, then the audit — and only then everything else. That order is not a preference, it is what the failure data says. In a scan of 107,308 domains on 13 July 2026, Cloudflare Radar found 30.8% had no sitemap at all, and only 8.4% served AI crawlers a readable version of a page. Most SEO advice starts at step three. Almost a third of the web has not finished step one, and every check below it is measuring a site the search engines cannot fully enumerate in the first place.
36 free SEO tools, grouped by the job they do
SEO Audit & Site Analysis Tools
- Free SEO Audit Tool251 checks across 20 categories — crawlability, indexation, Core Web Vitals, on-page, structured data, and AI readiness. Renders JavaScript the way Googlebot does, so hydration-hidden content shows up as a finding instead of passing silently.
- GEO Audit ToolChecks whether the AI answer engines can actually read you: crawler access for GPTBot, ClaudeBot, PerplexityBot and friends, plus the passage structure they extract from. Most sites fail on robots.txt before content ever matters.
- Website Speed Test ToolMeasures real load performance and tells you which resource is holding the page back. Speed is a ranking input via Core Web Vitals, but the useful output here is the specific blocking asset, not the score.
- Mobile-Friendly Test ToolConfirms the page works on the phone Google actually indexes with. Googlebot has crawled mobile-first since July 2024 — a desktop-only layout is not a UX problem, it is an indexing one.
- Website Hosting CheckerIdentifies which host and CDN a domain runs on. Useful for diagnosing latency you cannot explain from the page itself, and for sizing up a competitor's stack.
Keyword Research & SERP Tools
- Free Keyword Research ToolDiscover high-value keywords for your content strategy. Find search volumes, competition levels, and related terms to target the right audience.
- Google SERP Rank CheckerTrack your website's position in Google search results for targeted keywords. Monitor ranking changes and optimize accordingly.
- Bing SERP Checker ToolDon't overlook Bing! Check your rankings on Microsoft's search engine and capture additional organic traffic.
- YouTube SERP Rank CheckerOptimize your video content by tracking YouTube search rankings. Perfect for content creators and businesses using video marketing.
- Google AI Overview Keywords CheckerCheck which of your keywords trigger Google AI Overviews and track your presence in AI-generated search results.
Technical SEO Analysis Tools
- Robots.txt TesterVerify your robots.txt file to ensure search engines can properly crawl your website. Avoid blocking important pages accidentally.
- Sitemap Checker ToolValidate your XML sitemap and ensure all important pages are discoverable by search engines.
- Crawlability Test ToolIdentify crawling issues that might prevent search engines from properly indexing your content.
- HTTPS Header CheckerAnalyze HTTP headers to ensure proper security implementation and technical SEO compliance.
- LLMs.txt GeneratorGenerate an llms.txt file to guide how AI crawlers and language models access and cite your website's content.
Content Optimization Tools
- Keyword Density CheckerOptimize your content by analyzing keyword frequency and distribution. Avoid over-optimization while ensuring proper keyword usage.
- Meta Tags CheckerExtract and analyze meta titles, descriptions, and other meta elements crucial for search engine visibility.
- Internal Link Analysis ToolExamine your internal linking structure to improve user navigation and distribute page authority effectively.
Link Building & Authority Tools
- Free Backlink Checker ToolLists the referring domains pointing at a site, with the follow/nofollow split. The number that matters is referring domains, not total links — a thousand links from one domain is one vote.
- Domain Authority CheckerScores a domain's link authority so you can size up a target before you spend a week pitching it.
- Page Authority CheckerSame measure at page level. Useful for the thing domain authority hides: a strong domain can carry a page nobody links to.
- Anchor Text Link ExtractorShows the anchor-text distribution across a link profile. A profile that is 80% exact-match anchors is not a strong profile, it is a paid one, and it reads that way to Google too.
Advanced SEO Utilities
- URL Redirect CheckerFollows a URL through its full redirect chain and reports every hop. Chains leak equity and are invisible until you look — a 301 pointing at another 301 is the classic finding.
- Google Cache Date CheckerShows when Google last cached a page — a rough read on how often it gets recrawled.
- Organic Traffic CheckerEstimates any domain's organic traffic, including a competitor's.
- Website Technology CheckerIdentifies the CMS, server, and framework behind any site.
- URL Slug GeneratorTurns a title into a clean, lowercase, hyphenated URL slug with the stop words stripped.
- UTM Link GeneratorBuilds a correctly tagged campaign URL so your analytics can actually attribute the click.
- Email Verification ToolValidates an email address before you send to it, so a pitch to a dead mailbox does not quietly count as a rejection.
- Reverse Email LookupFinds what a public email address is attached to — useful for qualifying an outreach target before you write to them.
- Extract Emails from TextPulls every email address out of a block of pasted text.
- QR Code ReaderDecodes a QR code image back to its underlying URL, so you can see where one actually points before you trust it.
- Company Logo APIFetches any company's logo by domain — a simple API for enriching directories, CRMs, and content.
Competitor Analysis Tools
AI-Powered SEO Assistant
- AI SEO AssistantGet personalized SEO guidance and task recommendations powered by artificial intelligence and industry expertise.
- SEOmator GPT IntegrationAccess real-time search volume data, keyword analysis, and SERP insights through advanced AI capabilities.
- Google AI Mode CheckerSee how your site appears in Google's AI Mode and monitor your visibility across AI-driven search experiences.
The order to run them in (and why)
Sitemap first — 30.8% of top domains do not have one
Run the Sitemap Checker. If it 404s, that is the finding, and nothing below it is worth measuring yet: you are optimizing pages the crawler cannot reliably enumerate. Cloudflare Radar's July 2026 scan puts the gap at 41.6% in education and 31.1% in tech.
Then robots.txt — because a block makes everything else moot
80.5% of domains now carry AI rules in robots.txt (Radar, July 2026), and most of them were inherited from a template nobody has read since 2023. Check whether you are blocking a crawler you meant to allow. An accidental Disallow outranks every optimization you make downstream.
Then the audit — 251 checks, in one pass
Only now is a full audit worth running, because it is finally measuring the site the crawlers actually see. It renders JavaScript the way Googlebot does, so content hidden behind hydration is reported instead of silently passing.
Then rankings and keywords — the part everyone starts with
Rank checking and keyword research are the fun tools, and they are genuinely useful. They are also the ones most likely to give you a confident answer about a site that is quietly failing step one.
Then AI visibility — the newest layer, and the emptiest
Run the GEO audit. Only 8.4% of domains serve agents a machine-readable page (Radar, July 2026), so this is the rare SEO surface with no crowd on it yet.
What these tools tend to find
Redirect chains nobody knew existed
A 301 pointing at another 301, usually left behind by a migration. It works in a browser, so nobody notices — and it leaks equity at every hop.
Content that only exists after JavaScript runs
The page looks complete to you and half-empty to a crawler. This is the failure mode that a rendering-aware crawl catches and a plain HTML fetch does not.
An AI crawler blocked by a copy-pasted robots.txt
The single most common own-goal in 2026: a Disallow inherited from a template, blocking the exact bot you now want citing you.
Anchor text that reads as paid
An 80% exact-match anchor profile is not a strong link profile. It is a purchased one, and it looks that way to Google too.
A missing sitemap on a site that badly needs one
Small sites can survive without one because the crawler can walk the nav. Large ones cannot — and large ones are where we keep finding it missing.
How these tools work, and where they stop
No signup, no credit card
Every tool on this page runs against a live URL and returns a result without an account.
Real checks, not estimates
The audit runs 251 rules across 20 categories; the crawler renders JavaScript the way Googlebot does rather than fetching raw HTML.
They tell you what is wrong, not what to write
These are diagnostic tools. They will find the broken canonical; they will not write the page for you.
Third-party metrics are estimates, and we say so
Domain authority, organic traffic and search volume are modelled numbers, not measurements. Use them to compare, not to report.
Free tools are a snapshot; tracking is a time series
A one-off check tells you the state today. Catching a 7-position slide in 6 days needs daily tracking, which is what the paid product is for. We would rather say that than pretend otherwise.
Start optimizing your website today
Don't let poor SEO hold back your online success. Our free tools provide everything needed to improve your search engine rankings and drive more organic traffic — from basic site audits to advanced competitor analysis.