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Free JavaScript Minifier — Minify & Compress JS Code
Minify JavaScript by removing comments and whitespace.
About JavaScript Minifier
Paste JavaScript code and get a minified version with comments, whitespace, and unnecessary semicolons removed. Shows original size, minified size, and compression percentage. Useful for optimizing snippet-sized scripts before inline embedding, reducing bandwidth for simple scripts, or quickly checking how much bloat comments add to your code. For production builds, pair with a full bundler like Webpack or esbuild.
How to Use JavaScript Minifier
- 1Paste your JavaScript code in the input panel
- 2Click Minify to strip whitespace, comments, and shorten variable names
- 3Compare original and minified sizes
- 4Copy the minified JS and save as .min.js for production
When to Use JavaScript Minifier
- ▸Minifying JavaScript for production deployment
- ▸Reducing bundle size for faster website loading
- ▸Obfuscating client-side code to deter casual inspection
- ▸Preparing JS snippets for CDN and third-party distribution
Frequently Asked Questions
- Does minification affect code behavior?
- Proper minification preserves all functionality. The tool shortens local variable names and removes non-functional whitespace and comments. Your code runs identically but is much harder to read.
- Should I minify JS or use a bundler?
- This tool is for quick minification of individual files. For production websites, use a bundler like Webpack, Vite, or esbuild that includes minification along with tree-shaking and code splitting.