Free tools
Search and content
6 toolsCrawl a site, then check what it says once you get there.
SEO audit
Website SEO checker and technical site crawler
Crawl a domain, page or sitemap — up to 100 URLs — and get 64 technical checks in a table you can export. Titles, canonicals, redirects, structured data, hreflang and AI crawler access.
Broken link checker
Dead link finder and 404 checker
Test every internal link, external link and image — up to 750 destinations — for 404s, dead domains and redirect chains. Shows the page and anchor text for each one.
Keyword clustering tool
Group keywords into pages by search intent
Expand up to 5 seed keywords, split them by what the searcher wants, and check each cluster against Google's top 10 and real per-phrase search volume.
Readability checker
Flesch, grade level and the sentences dragging you down
Six readability formulas computed exactly, plus the long sentences, complex words and passive constructions behind the number.
Nothing uploadedSimilarity checker
Duplicate content and shared passages
Compare two documents or URLs and see how much they share — in both directions, since how much of yours is in theirs is a different question from the reverse.
Nothing uploadedAI content detector
Does this text read as machine-written?
A real classifier running in your browser, not a heuristic. States its own error rate plainly, including the false positives on formal and non-native English.
Runs in browserCustomers and feedback
1 toolA file people already have, read properly instead of skimmed.