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JavaScript Beautifier

Reformat dense JavaScript into readable code for debugging.

JSON Formatter
JavaScript Beautifier
Processed entirely in your browser. No uploads, no background processing, and no account required.
Ctrl+Enter Beautify Ctrl+Shift+Enter Validate Ctrl+Shift+C Copy
JavaScript input Editable input
1 line | 0 chars | 0.0 KB
Beautified JavaScript Read only output
1 line | 0 chars | 0.0 KB
Ready Browser only
Paste content into the input editor and run an action.
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JavaScript Beautifier

When JavaScript is compressed into a single line or copied from logs, browser devtools, or bundled assets, it quickly becomes painful to reason about. A beautifier gives that code structure again so you can trace control flow and inspect nested data with much less friction.

This tool formats JavaScript locally using a stable parser and formatter bundle in the browser. It also includes a validation pass so you can check syntax before copying the result back into a patch or debugging session.

How to Use the JavaScript Beautifier

  1. Paste JavaScript into the input editor.
  2. Use Beautify to reformat the code with normalized spacing and indentation.
  3. Use Validate to check that the code parses cleanly.
  4. Copy or download the result once the output looks right.

JavaScript Beautifier Examples

Before 
const users=[{id:1,name:"Asha"},{id:2,name:"Kiran"}];users.forEach((user)=>{console.log(user.name)})
After 
const users = [
  { id: 1, name: 'Asha' },
  { id: 2, name: 'Kiran' },
];

users.forEach((user) => {
  console.log(user.name);
});

Frequently Asked Questions

  • Does this beautifier support modern JavaScript syntax?

    Yes. It uses a browser-bundled formatter that can parse common modern JavaScript syntax.

  • Is the code sent to a server?

    No. Formatting and validation stay on your device.

  • Can I validate code without changing it?

    Yes. The Validate action checks syntax and reports any parser error in the status panel.

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