Free SEO and AI-visibility tools
Free SEO and AI-visibility tools. No account, no limits beyond fair use. Every tool is also available to your AI assistant through the OnPage.dev MCP server.
Full page scanScore, fixes, Google and social preview, AI readiness and more for any page.
robots.txt tester for Google and AI crawlersTest if Googlebot, GPTBot, ClaudeBot, PerplexityBot and other crawlers may fetch a URL, with the exact robots.txt rule that decides.
llms.txt generatorGenerate an llms.txt for your website from its sitemap and home page in seconds.
Google snippet checkerCheck if your title tag and meta description fit in Google on desktop and mobile, measured in pixels, and see where they get cut off.
Redirect checkerCheck status codes and full redirect chains for up to 20 URLs at once, and verify each one ends at the right page.
Schema markup validatorValidate JSON-LD structured data before you publish: syntax, @context and @type, ISO dates, absolute URLs and Google’s required fields for rich results.
Guides
How to check if ChatGPT can read your websiteThree checks that decide whether ChatGPT and other AI assistants can find, read and quote your site: robots.txt, content in the HTML, and pages that answer questions..
How to block AI training but allow AI search in robots.txtKeep your content out of AI model training while staying visible in ChatGPT search, Claude and Perplexity.
What is llms.txt and how to create onellms.txt explained: what the file is for, what goes in it, an example, and how to create one for your site in a minute.