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HTML Formatter

Format and beautify messy HTML with proper indentation. Free online HTML formatter that runs entirely in your browser — nothing is uploaded.

Runs in your browser Nothing uploaded Free, no signup

Everything stays in this browser

HTML Formatter: questions

Is my HTML uploaded to a server?
No. Formatting happens entirely in your browser with JavaScript. Your code never leaves your machine.
Does it support large files?
Yes — it comfortably handles documents in the megabyte range.
All 112 free tools
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Made something with AI? Share it as a private link.

Drop in the HTML from Claude, ChatGPT or any editor and get a link your client can open anywhere — with a password, view tracking, comments and approval.

Publish your HTML HTML to link