LLM HTML Visibility Checker
AI crawlers and extractors read your served HTML — most don't run your JavaScript, and many skip elements marked hidden. Paste a URL and see exactly how many words survive: normal flow, hidden streaming blocks, or nothing until JS runs.
The failure this catches
Modern frameworks stream page content into blocks marked hidden and reveal them with JavaScript. The words are in the file — a raw-HTML reader finds them — but a text-mode reader that honors the hidden attribute renders a page of 30 words instead of 2000. We found this on our own site first: most of our pages carried their body only in hidden streaming blocks, and we rebuilt them. This tool is that measurement, for any URL.
Reading the three numbers
Total words is what raw-file readers can extract. Flow words is what text-mode readers render. A large gap between them means your content's visibility depends on which kind of reader shows up — and you don't control that. Under 100 total words means the page is a JavaScript shell, invisible to every non-rendering reader at once.
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