Home » Developer Tools » JavaScript Beautifier
Paste messy JavaScript and get clean, readable code with proper indentation in seconds.
Your code never leaves your browser. Everything runs locally on your device.
Minified or messy JavaScript is hard to read, debug, and edit. The JavaScript Beautifier reformats your code with clean indentation and sensible line breaks, so you can actually understand what it does.
It runs entirely in your browser, so your code stays private. Paste your script, pick an indent size, and copy the formatted result.
Yes, it is completely free with no sign up and no limits. Format as much JavaScript as you like.
No. Beautifying only changes whitespace and line breaks. Your code logic stays exactly the same.
Yes. Use the indent size option to format with 2 spaces or 4 spaces, whichever your project uses.
Yes. Code squashed onto one line is expanded into readable, properly indented code.
No. All formatting happens in your browser on your own device, so your code never leaves your computer.
The tool shows a clear error message and keeps your input untouched, so you can fix the error and try again.
Once your code is readable again, you can check it quickly in the online code editor before putting it back into your project.