Free SEO tools · AI search ready
Modern SEO tools for the AI search era
See your website the way Google, ChatGPT, Claude and Perplexity see it. Free tools, original research and practical guides. No signup needed.
Popular tools
AI Bot CheckerCheck which AI crawlers your robots.txt allows or blocks: GPTBot, ClaudeBot, PerplexityBot, Google-Extended and 15 more.llms.txt Generator and ValidatorCreate a valid llms.txt file for your website in minutes, or check an existing one against the llms.txt format.Robots.txt Tester and GeneratorTest whether Googlebot or any AI bot can crawl a URL, find the exact rule that applies, and generate a new robots.txt.SERP Snippet PreviewPreview how your title tag and meta description look in Google on desktop and mobile, with real pixel widths.Schema Markup GeneratorGenerate valid JSON-LD structured data for articles, FAQs, organizations, local businesses, products and breadcrumbs.Domain Authority CheckerCheck the authority of any domain for free: a 0 to 100 score based on its global Tranco ranking and Open PageRank, plus domain age.
Why SEOOn.page
Built for AI search
Search now happens in Google and in AI assistants. Our tools check both: robots.txt for AI bots, llms.txt, structured data and more.
No signup, no limits on the basics
Every free tool works in your browser right away. We never ask for an email to show you a result.
Research you can cite
We publish original studies with open datasets under a CC BY license, so journalists and SEOs can use the data.
Latest research
October 2026Email Spoofing Protection in the World’s Top 10,000 Websites (2026)We checked the SPF and DMARC records of 6,971 top websites. 85% have SPF, but only 55.9% enforce a DMARC policy that tells mail servers to block forged email.October 2026The State of robots.txt (2026): 6,000 Top Websites AnalyzedWe analyzed the robots.txt of the world's top websites. GPTBot is now named in more files than Googlebot, 71.1% declare a sitemap, and many still use rules that Google ignores.October 2026AI Bots vs the World’s Top 10,000 Websites (2026)We analyzed the robots.txt of the world's 10,000 most popular domains. 17.4% of the websites block at least one AI bot, and the most popular sites block the most.