Code Beautifier
Format and indent HTML, CSS, JavaScript, and JSON instantly.
JSON
HTML
CSS
JavaScript
Input
Output
What is a code beautifier?
A code beautifier (also called a code formatter or pretty-printer) takes code that is minified, compressed, or inconsistently indented and reformats it with consistent indentation, line breaks, and spacing to make it easier to read and edit. This is the opposite operation to minification, which removes whitespace to reduce file size.
This tool supports four languages. JSON formatting uses the native browser JSON.parse and JSON.stringify for reliable output. HTML, CSS, and JavaScript formatting uses rule-based indentation logic that handles the most common patterns. For production use, consider running code through a dedicated formatter like Prettier after this tool.
How to use
- Select the language tab β JSON, HTML, CSS, or JavaScript.
- Paste your code into the Input panel on the left.
- Click Beautify (or it formats automatically after a short pause).
- The formatted result appears in the Output panel on the right.
- Click Copy output to copy to clipboard, or Download to save as a file.
- Check Minify instead to go the other direction and compress the code.
Frequently Asked Questions
The JSON beautifier is exact β it uses the browser's native parser. The HTML, CSS, and JavaScript formatters use rule-based indentation which works well for standard code but may not handle all edge cases. For production-critical formatting, run the output through Prettier or a language-specific formatter. This tool is best for quickly reading minified code or cleaning up paste-and-go snippets.
Beautifying adds whitespace, indentation, and newlines to make code human-readable. Minifying does the opposite β it removes all unnecessary whitespace, newlines, and comments to produce the smallest possible file size for faster browser loading. This tool can do both: uncheck "Minify instead" to beautify (the default), or check it to compress.
No. All formatting runs entirely in your browser. Your code is never sent to any server, never logged, and never stored. Closing the tab removes everything immediately. This means the tool works offline too.