Free tools
Free SEO tools.
Real data from our own 3B+ page web index. No signup for 5 checks a day, or sign up free for 25.
All free tools
Backlink checker
See every page linking to any domain: full referring domain list, anchor text, and link types.
Domain authority
Score any domain by referring-domain count, popularity rank, and registration history.
Tech stack
Detect server, language, frameworks, and CMS for any website. No Chrome extension required.
Page speed
Run a Lighthouse audit and pull Core Web Vitals (LCP, CLS, INP) for any URL.
Similar websites
Find websites with overlapping link profiles: competitor research without the SimilarWeb paywall.
Domain age
See exactly when any domain was first registered, plus its registrar and popularity rank.
Meta tag analyzer
Inspect title, description, H1, and canonical tag for any URL with length warnings.
Link intersect
Find websites linking to your competitor but not to you, the highest-ROI link-prospecting workflow.
Backlink report (PDF)
Enter a domain and your email to get a full PDF backlink report delivered to your inbox.
Browser extension
All of these checks in your browser, plus on-page DOM inspection (link types, meta tags, schema, headings) and SERP overlays. Uses your existing API key.
Beyond the free tools
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