CSS Minifier & Formatter — Free Online CSS Compressor & Beau

css-minifier icon

Minify or format CSS instantly with compression stats, syntax validation, and one-click download. Runs entirely in your browser — no code ever uploaded. This free online CSS minifier & formatter runs entirely in your browser — no data is ever uploaded to a server.

How to Use

1. Enter your input — type or paste your CSS to minify or format (paste, or load a .css file).

2. See live results — the tool updates instantly as you type.

3. Copy or download — copy the output to clipboard or download it.

4. History — your recent inputs are saved locally and can be pinned for quick access.

Example

Paste a stylesheet and click Minify — the tool strips comments and whitespace, shortens zero values, and shows how many KB you saved plus the compression ratio. Switch to Format to beautify it.