JavaScript Formatter & Minifier
Beautify or minify your JavaScript code instantly with Prettier and Terser. Supports ESNext, TypeScript, JSX, and recursive formatting. 100% private.
How to Use
The Professional JavaScript Formatter provides industry-standard code cleanup and minification directly in your browser.
How to use this tool
- Paste Code: Enter your JavaScript, TypeScript, or JSX into the "Source Code" editor on the left.
- Choose Mode: Select Beautify to make your code readable, or Minify to shrink it for production.
- Configure Rules: If beautifying, adjust the tab width, quote style, and semicolon preferences in the sidebar.
- Real-time Preview: The tool automatically processes your code as you type, with instantaneous syntax error highlighting.
- Copy or Download: Use the one-click copy button to grab your results, or download the output as a `.js` file.
About This Tool
Modern Engineering Stack
We don't use simple regex for formatting. Our tool utilizes Prettier, the industry-standard "opinionated" formatter, ensuring that your code follows modern best practices and consistent style guides.
For minification, we use the Terser engine, the same technology used by Vite and Webpack to optimize production bundles. It performs advanced constant folding, dead-code elimination, and safe variable mangling to reduce your file size to the absolute minimum.
Why Use This Tool
100% Private Development
Proprietary business logic and intellectual property should never be uploaded to a server for formatting. Our tool runs **entirely in your local browser memory**. Prettier and Terser are lazy-loaded on-demand, ensuring that your code stays private and your data sovereignty is respected.