HTML Formatter

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

Ctrl+Enter to run | Ctrl+K to switch tools | Recent button shows input history

Repeating this work? Turn this kind of browser utility into an API batch, MCP prompt, extension workflow, or shared team recipe.

FAQ

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.