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Code Formatter

Format and beautify code

About Code Formatter

Code Formatter reformats JSON, CSS, or HTML entirely in your browser. JSON is parsed and re-serialized with 2-space indentation (invalid JSON shows a clear error), while CSS and HTML use simple pattern-based rules to add line breaks and indentation rather than a full parser. Only these three languages are supported — JavaScript, Python, Java, and others aren't available.

How to use Code Formatter

  1. 1Choose JSON, CSS, or HTML from the language buttons.
  2. 2Paste your code into the input box.
  3. 3Click 'Format' to reformat it.
  4. 4Click 'Copy' to copy the formatted result.

Frequently Asked Questions

What languages does Code Formatter support?

Only JSON, CSS, and HTML — there's no JavaScript, Python, Java, C++, PHP, or SQL formatting.

Is Code Formatter free to use?

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

Does it store my code?

No, formatting happens entirely in your browser; nothing is uploaded to a server.

Can I customize indentation, bracket style, or other formatting rules?

No — each language uses one fixed formatting style with no customization options.

Tips & Tricks

  • ✓JSON formatting uses a real parser, so invalid JSON shows a clear error instead of a best-effort guess.
  • ✓CSS and HTML formatting use simple pattern-based rules rather than a full parser, so unusual or deeply nested code may not indent perfectly — always review the result.
  • ✓There's no auto-detect language or dark mode toggle — pick the language manually each time.
  • ✓Copy the result right away, since there's no file download or save feature.