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HTML Formatter

Format and beautify HTML

About HTML Formatter

HTML Formatter adds line breaks and indentation to HTML entirely in your browser using simple pattern-based rules — splitting on adjacent tags and tracking nesting depth — rather than a full HTML parser. It recognizes common self-closing tags (br, hr, img, input, link, meta) so they don't affect indentation depth, but it doesn't validate your markup or offer indentation customization.

How to use HTML Formatter

  1. 1Paste your HTML into the input box.
  2. 2Click 'Format' to add line breaks and indent nested tags.
  3. 3Review the result in the output box.
  4. 4Click 'Copy' to copy it to your clipboard.

Frequently Asked Questions

Is HTML Formatter free to use?

Yes, it's completely free with no signup required.

Will it validate my HTML or flag errors?

No — it only reformats indentation and line breaks; it doesn't check for invalid or malformed markup.

Can I customize indentation size or style?

No, indentation is always 2 spaces per nesting level — there's no option to change it.

Is my code uploaded to a server?

No, formatting happens entirely in your browser.

Tips & Tricks

  • ✓Works well for typical, well-formed HTML with standard tags; unusual or deeply nested markup may not indent perfectly since it's pattern-based, not a full parser.
  • ✓Self-closing tags like br, hr, img, input, link, and meta are recognized and won't throw off indentation — other void elements (like source or wbr) aren't specifically handled.
  • ✓A quoted attribute value containing '><' (e.g. placeholder="a><b") is scanned correctly and won't be split onto separate lines.
  • ✓Copy the result right away, since there's no file download or save feature.