Free SEO tools
Quick, single-purpose checks for any page. No signup. Each tool runs one of the analyzers from a full SEODevil audit.
AI Crawler Checker
Free check: can ChatGPT, Claude, Perplexity and Gemini crawlers reach your site? Tests robots.txt rules per AI bot, firewall and CDN blocks, and llms.txt.
Meta Tag Checker
Check any page's title tag, meta description, canonical, Open Graph and Twitter Card tags. See a Google preview and get fixes for length and missing tags.
Robots.txt Checker
Fetch and test any site's robots.txt. Find rules that block all crawling, missing sitemap references, and noindex or nofollow directives on the page.
Schema Markup Checker
See which schema.org structured data a page has (JSON-LD, Microdata, RDFa), find invalid JSON-LD, and get the markup types you're missing.
Heading Checker
See the H1–H6 outline of any page. Find missing or multiple H1s, skipped heading levels, empty headings and headings that are too long.
A free SEODevil audit runs all 11 analyzers, scores every issue by severity and builds a step-by-step action plan.