HTML tool

Analyze HTML — only in your browser

Paste HTML or choose a local file. We do not upload it, execute its scripts or load its images.

Paste HTML or choose a local file. We do not upload it, execute its scripts or load its images.

Page URL (reference only, never visited)

Choose a local HTML file

HTML to analyze

At most 2 MB. Only the supplied HTML is assessed; JavaScript, CSS layout, HTTP headers, link status and Core Web Vitals are not verified.