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robots.txt AI CrawlersiChecks that GPTBot, ClaudeBot, PerplexityBot, and Google-Extended are not blocked — blocking these prevents AI engines from indexing your content entirely.
No AI crawlers blocked
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llms.txtiChecks for /llms.txt at the domain root — an emerging convention that tells AI crawlers what your site is about and what content is worth indexing.
llms.txt not found (404)
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No-JS RenderingiChecks that the page's H1 and body paragraphs are visible without JavaScript — AI crawlers typically don't execute JS, so client-rendered content is invisible to them.
Core content visible without JavaScript
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Schema TypesiChecks for JSON-LD structured data and reports which @type values are present — schema markup helps AI engines understand and attribute your content.
No JSON-LD structured data found
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Opening ParagraphiChecks that the first paragraph in <main> is 200–600 characters — AI engines use the opening paragraph as a summary and source for citations.
Too short (37 chars, aim 200–600)
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Question HeadingsiChecks that at least one H2 or H3 is phrased as a question — question-answer structure is the primary format AI engines use when generating responses.
1 question heading found