Free SEO tools
Each of these checks one URL or answers one question, straight away, with no account. They spend no credits: they read public pages, or run in your browser.
They are the single-page versions of work IndexZero does across a whole site. When one page is not enough, an agent connected to IndexZero can run the same checks on every page and track the fixes.
- robots.txt tester and AI crawler checkerFetch a site's robots.txt, check it for errors, and see whether Googlebot, GPTBot, ClaudeBot, PerplexityBot and other crawlers may fetch a given path.Open tool →
- SEO checkerRun the on-page checks from IndexZero's site audit against one URL: titles, meta descriptions, headings, canonicals, indexability, redirects and response time.Open tool →
- Meta tag checker and SERP previewRead a page's title, meta description, canonical, Open Graph and Twitter tags, and preview how the page may appear in Google results and link shares.Open tool →
- Schema markup validatorExtract the JSON-LD structured data from a URL or pasted code, catch syntax errors, and check each type against the properties Google documents for rich results.Open tool →
- SEO tool cost calculatorCompare the monthly cost of Ahrefs, Semrush and IndexZero for your number of sites and teammates, and whether you need AI visibility or agent access.Open tool →