JavaScript Formatter
JavaScript Formatter is a free online tool for beautifying and minifying JS code with full ES6+ support. Format code with one click or minify it with Terser, choose 2/4/8-space indentation and semicolon handling, all inside a syntax-highlighted editor.
Everything runs locally in your browser — your code is never uploaded to any server, and no registration is needed. Great for front-end developers un-minifying third-party scripts, enforcing a consistent style, or shrinking JS files before release.
How to Use
- Paste or type your JavaScript code into the editor
- Pick the indent size and toggle the semicolon option if needed
- Click Format to beautify, or Compress to minify with Terser
- Click Copy to copy the result to your clipboard
FAQ
Is this JavaScript formatter free?
Yes, it is completely free with no registration required and no usage limits on formatting or minifying.
Is my JavaScript code safe to paste here?
Yes. Both formatting and minifying run entirely in your browser — your code is never sent to any server.
Does it support modern ES6+ syntax?
Yes. It handles arrow functions, destructuring, template literals, async/await, and other ES6 and newer syntax.
What engine powers the minifier?
Minification is powered by Terser, the industry-standard JS minifier, running in your browser. It removes whitespace and comments and shortens variable names to significantly reduce code size.