HTML Formatter

Format, beautify, and minify HTML instantly in your browser.

FreeBrowser-basedInstant
Result
Paste or type HTML on the left to see it formatted here.

Your files are processed locally in your browser and are not uploaded to our servers. Formatting happens instantly as you type, entirely in your browser — nothing is sent anywhere.

How to use HTML Formatter

Paste or type HTML into the input box and this tool reformats it with consistent nested indentation as you type — each element on its own line, indented to match its depth in the document. Content inside <script>, <style>, <pre>, and <textarea> tags is left untouched so it keeps working exactly as written. Switch to Minify for a compact, whitespace-stripped version, then copy it to your clipboard or download it as an .html file.

Key features

  • Instant client-side formatting as you type
  • Consistent nested indentation that follows the document's element depth
  • Content of script/style/pre/textarea elements left untouched
  • Adjustable indentation (2 spaces, 4 spaces, or a tab)
  • One-click Minify mode for a compact, whitespace-stripped output
  • Syntax-highlighted result (tags, attributes, values)
  • One-click copy to clipboard, or download as an .html file

Practical use cases

  • Cleaning up minified or auto-generated HTML pulled from a live page for readability
  • Tidying up hand-written HTML before a code review
  • Minifying a page's markup before shipping it to production
  • Standardizing indentation across an HTML file with mixed formatting

Supported formats

Accepted: html

Limitations

  • A hand-written formatter, not a full HTML parser — deeply unusual or malformed markup may not reformat perfectly
  • Minify mode collapses whitespace everywhere, including inside <pre>/<script>/<style> blocks, which can change whitespace-sensitive content
  • Very large documents (multiple megabytes) may be slow on low-memory devices

Frequently asked questions

Does this tool upload or store my HTML anywhere?
No. All formatting and minifying happens locally in your browser using JavaScript. Your HTML is never transmitted or stored.
Will it mess up the code inside my <script> or <style> tags?
No. The content of <script>, <style>, <pre>, and <textarea> elements is left exactly as written — only the surrounding tags are indented — since reformatting the inside of those elements could change what they mean.
Can it minify HTML as well as format it?
Yes. Switch the output mode from "Pretty" to "Minify" to get a compact, whitespace-stripped version — useful for shrinking a page before shipping it.
What happens if I paste invalid or broken HTML?
The formatter does its best to reformat whatever structure it can find, but badly broken markup (unclosed tags, mismatched nesting) can produce unexpected output — always review the result before using it.

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