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Free AI SEO Tools

Free, no-signup AI SEO tools for the 2026 AI search era. Generate JSON-LD schema, check whether GPTBot, ClaudeBot, and PerplexityBot can crawl your site, extract every meta tag from any URL, and build an llms.txt file in seconds. Built by the TurboAudit team — each tool solves one focused problem, no funnel gates.

No signup · all 4 tools free10 AI crawlers checked by robots.txt bot checker+42.6% AI citation lift from FAQ + Article schema — Princeton GEO paper
By Ibrahim Furkan Ozcelik·Updated

JSON-LD Schema Generator

Build structured data in seconds

Generate valid JSON-LD for Article, FAQ, Product, Organization, and BreadcrumbList schemas. Paste-ready, spec-compliant, works with Google Rich Results and AI crawlers (GPTBot, PerplexityBot, ClaudeBot).

Who needs it: Anyone publishing articles, products, or FAQs who wants their page eligible for Google rich results AND machine-readable for AI engines. FAQPage schema in particular roughly doubles AI citation rate for Q&A queries.

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Robots.txt AI Bot Checker

Are AI crawlers blocked on your site?

Check whether GPTBot, OAI-SearchBot, ChatGPT-User, ClaudeBot, PerplexityBot, Google-Extended, Bingbot, Applebot-Extended, Meta-ExternalAgent, and Bytespider can access any domain. See exactly which user agents are blocked.

Who needs it: Anyone who's never explicitly audited their robots.txt for AI crawlers. Many sites still block GPTBot from 2023-2024 reflexive blocking, making their entire content invisible to ChatGPT.

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Meta Tags Extractor

See every meta tag on a page

Paste any URL to extract title, description, canonical, Open Graph, Twitter Card, hreflang, robots, viewport, and more. Flags missing or misconfigured tags instantly — including AI-extraction-blocking meta tags like noindex and nosnippet.

Who needs it: SEO auditors, competitive researchers, and anyone debugging why a page isn't being cited. Meta config issues are one of the cheapest fixes for AI visibility.

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llms.txt Generator

Create an llms.txt file for your site

Generate a properly formatted llms.txt file — the emerging Mintlify-led convention for telling AI systems which content on your site matters. Note: Google's official AI Optimization Guide states llms.txt is NOT required; this is an opt-in convention, not a ranking factor.

Who needs it: Documentation-heavy sites, technical product docs, and developer tools that want to be explicitly machine-curated. Worth doing if your sitemap is sprawling; not worth obsessing over if your site is small.

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Sitemap Checker

10 spec-grounded sitemap.xml checks

Free XML sitemap validator. Checks Sitemap Protocol 0.9, Google's 50K URL / 50 MB caps, W3C lastmod validity, single-host path-match, and XML entity escaping. Flags <priority> and <changefreq> as informational (Google explicitly ignores them).

Who needs it: Anyone deploying a sitemap.xml at scale, debugging indexability gaps, or migrating CMS platforms. Stale sitemaps are the most common cause of silent indexing problems.

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Twitter / X Card Validator

X's official validator is dead — we replicate the spec

Free Twitter/X Card validator with visual preview. The official cards-dev.twitter.com validator was retired in August 2022 and never replaced. We replicate the documented developer.x.com spec with 10 checks plus Open Graph fallback coverage.

Who needs it: Content marketers and SEO teams updating share previews. Most 2026 SEO guides still link to the dead X validator — this is the honest replacement.

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AI Citeability Quick Check

Soon

Coming soon

A lightweight version of the full TurboAudit. Scan any URL for AI readiness signals — schema, E-E-A-T, direct answers — in under 30 seconds.

Who needs it: Anyone curious whether a specific page is AI-ready before committing to a full 250-check audit.

How these tools fit together

The four free tools above cover the cheapest, highest-leverage AI search optimizations — the ones every site should pass before paying for any audit, monitoring, or content tool. Run them in this order:

  1. 1
    Robots.txt AI Bot Checker — verify GPTBot, ClaudeBot, PerplexityBot, and Google-Extended aren't blocked. Most common cause of zero AI visibility. 30-second check; fix takes 5 minutes.
  2. 2
    Meta Tags Extractor — audit title, description, canonical, robots, and noindex/nosnippet directives. Meta config issues silently kill AI eligibility; this catches them.
  3. 3
    JSON-LD Schema Generator — add Article + FAQPage schema where missing. Per Princeton's 2024 GEO paper, structured citations and schema-content-match correlate with citation lift up to +27.7%.
  4. 4
    llms.txt Generator — opt-in machine-curation file for AI-first docs sites. Not required by Google; useful for sprawling documentation. Skip if your site is small.

For the underlying discipline these tools serve, see What Is GEO? · Generative Engine Optimization playbook · AI Search Ranking Factors.

Need the full audit?

These tools check one thing each. TurboAudit runs 250+ checks across 7 dimensions — technical access, schema, extractability, freshness, citeability, E-E-A-T, and risk. 5 free audits, no credit card.

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Sources for the stats on this page

  • Aggarwal et al. (2024) — GEO: Generative Engine Optimization, arXiv:2311.09735 (KDD '24)
  • Google Search Central — AI Optimization Guide (no schema required, llms.txt not a ranking factor)
  • Bing Webmaster Tools — AI Performance report (Feb 9, 2026 launch)
  • OpenAI — GPTBot & OAI-SearchBot documentation