Free SEO tools
Quick, single-purpose tools. No signup. Most run one of the analyzers from a full SEODevil audit on any page; the log analyzer reads your server log right in your browser, and the business idea finder shows what your city searches for that nobody offers yet.
Business Idea Finder
Find a profitable business idea in your city for free. See what locals search for, how many businesses on Google Maps already offer it, and the pain points behind the searches.
AI Bot Log Analyzer
Upload your server access log and see which AI bots crawl your site: GPTBot, ChatGPT-User, ClaudeBot, PerplexityBot and more. Catches fake bots. Runs in your browser.
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.
Noindex & X-Robots-Tag Checker
Free noindex checker: find noindex in the X-Robots-Tag header and meta robots tags, per bot. Also checks robots.txt, canonical, redirects and status code.
Redirect Checker
Free redirect checker: follow every hop with status codes and timing, find redirect chains, loops and meta refresh, and test http, https, www and non-www.
Domain Age Checker
Free domain age checker: see when a domain was registered, when it expires, its registrar and when it first appeared online, from official registry data.
Twitter Card & Open Graph Validator
Free Twitter card validator and Open Graph checker: preview how a link looks on X, Facebook and LinkedIn, and check og:image size, twitter:card and missing tags.
Favicon Checker
Free favicon checker: find every favicon a site declares, check that each loads, test it against Google's favicon rules for search results and preview it.
Meta Description Checker
Check any page's meta description and title tag length, plus canonical, Open Graph and Twitter Card tags. See a Google preview and get the exact tags to fix.
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.
Structured Data Checker
Free structured data checker: see which schema.org markup a page has (JSON-LD, Microdata, RDFa), find invalid JSON-LD, and get the types you're missing.
H1 & Heading Checker
Check the H1, H2 and other heading tags on any page. Find missing or multiple H1s, skipped heading levels, empty headings and headings that are too long.
Looking up a crawler? The AI crawler list has the user agent, IP ranges and robots.txt rules for every major AI bot.
A free SEODevil audit runs all 11 analyzers, scores every issue by severity and builds a step-by-step action plan.