CSS/JS Minifier
Minify or beautify your CSS and JavaScript code.
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About Code Minification
Minify CSS and JavaScript code to reduce file sizes for faster page loading. Remove whitespace, comments, and optimize your code for production deployment.
How It Works
- Paste your CSS or JavaScript code
- Click Minify to process
- Copy the minified output
Key Features
- CSS and JavaScript minification
- Removes whitespace and comments
- Significant file size reduction
- Copy minified output instantly
Frequently Asked Questions
- How much smaller will my file be after minification?
- Typical savings are 20–60% for CSS and 30–70% for JavaScript. The reduction depends on how much whitespace, comments, and long variable names the original code contains. Files with extensive comments or heavy formatting see the largest gains.
- Does minification break my code?
- A properly written minifier will not break valid CSS or JavaScript. However, code with certain patterns — like global variable reliance, eval() usage, or non-standard syntax — can behave unexpectedly after aggressive optimization. Always test minified code in a staging environment before deploying to production.
- Should I minify HTML too?
- HTML minification offers smaller gains than CSS or JS because HTML typically contains less whitespace and comments. It is still worth doing for high-traffic pages. Modern build tools like webpack, Vite, and Next.js minify HTML automatically during production builds.
- Can I reverse minification to read the original code?
- Our tool includes a beautify mode that reformats minified code with proper indentation and line breaks, making it readable again. However, variable names and comments that were removed during the original minification cannot be recovered — only the structure is restored.