HTML Prettify
Format HTML with indentation and line breaks to make it easier to read and edit. Great for expanding minified HTML. Runs locally in your browser.
Input
Output
Tip: You can verify in DevTools → Network that nothing is uploaded.
About this HTML Prettify
HTML Prettify takes compact or minified HTML and rewrites it with consistent indentation and line breaks so nesting and structure are easier to understand.
This is useful for debugging markup, editing templates, and reviewing generated HTML. Prettifying should only change whitespace, not the underlying tag structure.
- Process text data quickly without external tools
- Transform content for development workflows
- Clean and format text for analysis
- Enable Auto to transform as you type
- Upload text files directly from your device
- Download the result when done
FAQ
No. Everything runs locally in your browser. Nothing you paste is sent to a server.
After the page loads once, it will typically keep working offline (unless you hard refresh with no cache).
No. Your input stays in your browser. Only optional preferences like theme or language may be stored.
Any plain text. You can paste text directly into the input box.
It should only change formatting (whitespace). Valid HTML structure and content remain the same.
Yes. Prettify is especially useful for expanding minified HTML into a readable multi-line format.
No. It formats the input. If the HTML is invalid, formatting may not be perfect.