CSS Minifier

Compress and minify CSS by removing comments, whitespace, and redundant characters. Track savings with before/after stats. Free, instant, 100% private.

About CSS Minifier

Minify CSS by removing comments, whitespace, trailing semicolons before closing braces, and leading zeros in values. Track compression with detailed before/after size stats. All processing happens in your browser — your CSS never leaves your device.

Aggressive Compression

Removes comments, whitespace, last semicolons, and leading zeros. Reduces CSS file size by 30-60% for faster page loads.

Safe Minification

Preserves CSS functionality while stripping unnecessary characters. No functional changes — your styles work exactly as before.

Before/After Stats

See exact byte savings and compression percentage. Track your optimization progress and measure the impact of minification.

Production Ready

Paste from any source, copy minified output, or upload .css files. All processing in your browser — nothing uploaded to any server.

📋 Common Use Cases

Production Deployment

Minify CSS, JavaScript, and HTML files before deploying to production. Smaller files load faster and consume less bandwidth for users.

Build Pipeline Integration

Quickly minify individual files during development to test production behavior. Verify that minification doesn't break functionality.

Performance Optimization

Reduce total page weight by minifying inline styles and scripts. Combine with compression for maximum size reduction.

Code Size Analysis

Compare original vs minified file sizes. Identify which files benefit most from minification and track optimization progress.

🪜 How to Use This Tool

  1. Paste your source code
    Enter CSS, JavaScript, or HTML into the input area. Most minifiers accept raw code or file uploads.
  2. Configure minification level
    Choose aggressive or safe minification. Some tools let you preserve specific comments, license headers, or debug information.
  3. Review minified output
    See the compressed code and size reduction statistics — original size, minified size, and percentage saved.
  4. Copy or download
    Copy minified code to replace your source in production, or download as a .min file to serve alongside your original.

📚 Related Guides

Frequently Asked Questions

Are these dev tools free?▼
Yes. All dev tools are completely free. No signup, no account.
Is my data sent to a server?▼
No. Base64 encoding, URL encoding, JWT decoding, hash generation, and regex testing all happen in your browser. Your tokens and secrets stay on your device.
Can I decode JWTs safely?▼
Yes. JWT decoding happens entirely in your browser. The token never leaves your device. Only the header and payload are decoded — signatures are not verified server-side.