Code Beautifier — JavaScript, CSS, HTML & JSON

Format messy or minified JavaScript, CSS, HTML & JSON — instantly.

Stays on your device. This tool runs in your browser — nothing you paste or open ever leaves it. Nothing uploaded, nothing to leak.

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How to beautify code

Paste your code, pick the language from the dropdown, and press Beautify (or Cmd/Ctrl+Enter). It re-indents everything with consistent spacing and line breaks, and the result appears ready to copy. It handles JavaScript, CSS, HTML, XML and JSON.

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A code beautifier re-formats minified or messy code into clean, properly-indented, readable code. Paste JavaScript, CSS, HTML, JSON or XML, choose the language and press Beautify — it runs entirely in your browser, so your code is never uploaded.

Why beautify code

Minified production code is one unreadable line — beautifying it makes it possible to read, debug or learn from. It is also handy for tidying hand-written code, normalising indentation across a team, or making a config readable. Everything runs locally, so it is safe for proprietary code.

FAQ

Does it change what my code does?No — beautifying only adds indentation and line breaks. The code runs exactly the same; the change is purely cosmetic.

Is my code uploaded?No. It is formatted entirely in your browser — nothing is sent to a server or stored.

Which languages does it support?JavaScript, CSS, HTML, XML and JSON. For validating JSON specifically, the JSON Formatter is purpose-built for it.