Minify JavaScript to reduce file size for faster loading. Shows compression ratio and estimated savings. Configurable minification options.
Open JavaScript Minifier → free, no sign-inMinified JavaScript loads faster — whitespace, comments, and long variable names removed, the code functionally identical but significantly smaller. The JavaScript Minifier does this in the browser: paste your script, see the minified output, with compression ratio and estimated savings shown. Configurable options let you control exactly how aggressive the minification should be.
Developers preparing JavaScript for production deployment, anyone who needs to reduce script file size without setting up a build pipeline, or someone verifying how much a minifier will compress a particular file.
No tutorials. No learning curve. Open it and get started.
No server uploads. Shows compression ratio and estimated savings — so you know immediately how much the minification is worth.
Completely free. No trial period. No premium tier for basic functionality. No account required. Use it as often as you need.
One job, done well. JavaScript Minifier was built to solve a specific problem cleanly. No feature bloat, no ads, no distractions.
How much smaller will my file be?
Typically 20-60% smaller for production code, depending on how much whitespace and comments the original has.
Does minification change how the code works?
No — minified code is functionally identical to the original.
Can I minify TypeScript?
This minifier is for plain JavaScript. TypeScript should be compiled first.
Should I minify my code locally instead?
Yes — use a build tool (webpack, Vite, esbuild) for production. This tool is useful for quick checks or small scripts.
How do I debug minified code?
Source maps link minified code back to the original — generate them in your build tool.
Free. Instant. No sign-in. Open it and get the job done.
Open JavaScript Minifier on Doathingy.com →