Paste your HTML, pick your options, go.
Drop in an .html file or paste raw HTML, choose your indentation and sorting, then format, minify, or just validate. Everything runs on your device — nothing is uploaded.
Drop an .html file here or tap to browse
Or paste your HTML directly below
Auto-fix closes unclosed tags, quotes unquoted attributes and fixes mismatched elements. Decode entities converts < back to <.
Four steps, clean HTML.
No manual required — here's the entire flow.
Add your HTML
Paste your HTML into the box or drop in an .html file. It loads straight into the input area.
Set your options
Choose an indent size and turn on Sort attributes A→Z if you want every tag's attributes reordered alphabetically.
Format or minify
Tap Format HTML for a readable, color-coded layout, or Minify to collapse it to a single compact line.
Copy or download
Copy the result to your clipboard or download it as an .html file. Stats on size, tags, and depth are included.
Built for reading, not just printing.
The details that make debugging and cleaning up HTML faster, without ever leaving your browser.
Runs on your device
Parsing, formatting and minifying all happen locally in JavaScript. Your data never leaves your device.
Precise error detection
Invalid HTML gets pinpointed to the exact line and column, so you're not guessing where the syntax broke.
Advanced formatting
Choose 2 spaces, 4 spaces or tabs, sort attributes alphabetically, and read color-coded, easy-to-scan output.
Questions people actually ask.
The short answers — with the long ones one tap away.
How do I format HTML with this tool?+
Paste your HTML into the box, or drop in an .html file. Pick your indent size and any options, then tap Format HTML. The pretty-printed, color-coded result appears on the right, ready to copy or download.
Is my HTML uploaded to a server?+
No. Formatting, validating and minifying all happen locally in your browser using JavaScript. Your data never leaves your device, so it's safe to use with private or sensitive HTML.
Can this tool find errors in invalid HTML?+
Yes. If your HTML has unclosed tags or mismatched elements, the tool reports what went wrong along with the exact line and column where the problem starts, so you can jump straight to the fix.
Can I minify HTML instead of formatting it?+
Yes. Tap Minify to collapse your HTML into a single compact line with no extra whitespace — useful for shrinking page size before deployment.
Can I sort attributes in my HTML tags?+
Yes. Turn on Sort attributes A→Z before formatting, and every tag's attributes are reordered alphabetically — which makes diffing two HTML files much easier.
What indentation options are available?+
You can choose 2 spaces, 4 spaces, or a tab character for indentation. Minified output ignores this setting since it removes all whitespace.
Can this tool fix broken HTML automatically?+
Yes. Turning on Auto-fix common errors closes unclosed tags, quotes unquoted attributes, and fixes mismatched elements before validating — which resolves many of the small mistakes that break HTML.
Can I convert HTML entities?+
Yes. You can decode HTML entities (like < to <) or encode special characters back to entities, useful when embedding HTML in strings or templates.
Is this HTML formatter free to use?+
Yes, it's completely free with no account, no sign-up, and no limit on how many times you use it.