Free OnlineDeveloper Tools
JavaScript Beautifier
Beautify and format JavaScript code with proper indentation. Make minified JS readable with customizable formatting.
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Key Features — JavaScript Beautifier
Smart indentation for all JS structures
Customizable indent size and style
Handles ES6+ and modern syntax
Preserves comments and JSDoc blocks
Consistent brace and spacing formatting
Why Use This Tool — JavaScript Beautifier
Free Online Javascript beautifierFormat javascript — for EveryoneFast & Easy Js beautifierPretty print js — 100% FreeFree Online Javascript formatter
Privacy First
All processing happens in your browser. Your data never leaves your device.
Lightning Fast
Get instant results with zero wait time. No server delays, no loading screens.
Works Everywhere
Use on any device — desktop, tablet, or phone. No downloads or plugins needed.
Frequently Asked Questions — JavaScript Beautifier
Does it support modern JavaScript syntax?
Yes. The beautifier fully supports ES6 and later features including arrow functions, template literals, destructuring, optional chaining, nullish coalescing, async/await, classes, modules, and all current ECMAScript proposals that are stage 4.
Can I customize the formatting rules?
Yes. You can set the indent size (2, 4, or 8 spaces, or tabs), choose brace placement style (same line or new line), control how chained methods are formatted, and set maximum line length for wrapping long lines.
Does it fix syntax errors in my code?
No. The beautifier formats syntactically valid JavaScript only. If your code has syntax errors, the tool will report the error location so you can fix it, but it will not attempt to auto-correct the issue since guessing the intended code could introduce bugs.