JS Formatter & Minifier
Format JavaScript to make it readable, or minify it to reduce file size instantly.
About this tool
The JS Formatter prettifies JavaScript code by adding consistent indentation, spacing, and line breaks. The Minifier does the opposite — it strips all unnecessary whitespace and comments to produce the smallest possible file size for production deployment. Both transformations run instantly in your browser.
Unformatted JavaScript is common when receiving code from build tools, obfuscators, or third-party sources. Reformatting it makes the code readable so you can understand its structure, debug it, or review it for security issues. The formatter also reveals structural problems that are hidden in compact code.
Minified JavaScript reduces download sizes and parse times for end users, which directly affects page load performance. The minifier in this tool performs basic whitespace removal — for production builds, you'd typically use a full bundler like webpack or esbuild that can also perform tree-shaking and dead code elimination.