CSS Minifier Online
Shrink CSS rules and declarations for production. Runs locally with instant size stats.
Same browser tool as Code Minifier.
Drag and drop a file or paste up to 10 MB of code.
All minification and beautification runs locally in your browser. Your code is never uploaded or stored on a server.
About this page
CSS minification removes comments, extra spaces, and redundant syntax from stylesheets without changing computed styles.
Use this page for single-file stylesheets, critical CSS snippets, or quick size checks before deployment.
How to use
- Paste code or drop a file into the input area.
- Adjust minify options or switch to beautify mode if needed.
- Copy or download the result and review size statistics.
FAQ
- Will minifying CSS break my styles?
- Valid CSS minification preserves behavior. Invalid CSS may show an error instead of a broken output.
- Is my code uploaded?
- No. All processing happens locally in your browser.
- Is this tool free?
- Yes. No account is required.