Developer
JS Beautifier
- Browser-based
- No signup
Format messy or minified JavaScript into readable code. Choose 2-space, 4-space, or tab indentation. This page beautifies only—use JS Minifier to compress or JavaScript Formatter and Minifier for both operations.
100% Client-Side
Your data never leaves your computer.
How to use this tool
Paste JavaScript into the input editor. Formatted output updates as you type. Copy the beautified code for review, debugging, or documentation. Use JavaScript Formatter and Minifier to switch between format and minify.
Worked example
Example: `const x={a:1,b:2};function sum(a,b){return a+b}` becomes a multi-line script with indented object properties and a readable function body.
How it works
Opens the JavaScript Formatter in format mode. Expands minified or messy scripts into readable indentation with consistent braces and line breaks. Choose 2-space, 4-space, or tab indentation.
Limitations
Formatting only—does not minify, validate beyond the formatter, or obfuscate. Use JavaScript Formatter and Minifier to switch between format and minify.
Privacy and file handling
Your data is processed in your browser and is not uploaded to our server.
Frequently asked questions
Does this minify JavaScript?
No. JS Beautifier formats code for readability only. Use JS Minifier to compress or JavaScript Formatter and Minifier to switch between both.
Can it fix minified one-line scripts?
Yes. Paste minified JavaScript and copy the expanded output with consistent indentation.
Is my code uploaded?
No. Beautifying runs locally in your browser.
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