Free CSS & JavaScript Minifier
Compress your CSS and JavaScript files instantly. Reduce file size by up to 70% to speed up your website and improve Core Web Vitals.
Frequently Asked Questions
What does minifying CSS and JS do?
Minification removes unnecessary characters from your code — whitespace, comments, line breaks, and extra semicolons — without changing functionality. The result is smaller file sizes, faster page loads, and improved Core Web Vitals scores.
How much smaller will my code be after minification?
Typical results: CSS files shrink 20-40%, JavaScript files shrink 30-70%. Combined with gzip compression on your server, total transfer size can drop by 80-90% versus the original source.
Is it safe to minify production code?
Yes. Minified code runs identically to your original — only formatting is removed. However, always keep your original (non-minified) source files for development. Most build pipelines automatically minify during deployment.
Will minification break my code?
Reliable minifiers like Terser (used here) preserve functional behavior. Issues only arise with code that relies on whitespace or comment patterns (extremely rare). If in doubt, test the minified version in a staging environment first.
Should I minify before or after deployment?
Minify before deployment. Most modern build tools (Webpack, Vite, Parcel) minify automatically. For quick edits or static sites without a build process, this tool is the fastest way to compress your assets.
Need help with your business growth?
Free 30-minute strategy call. We will review your business, identify the highest-impact opportunities, and share an action plan tailored to your goals.
Book Your Free 30-Minute Call →