Convert CSS to Minified CSS

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About this conversion

Minify CSS with safe optimizations and output compressed styles. This converter processes your CSS file server-side and returns a Minified CSS file instantly — no account, no software installation, and no file storage. Files are deleted from our servers immediately after conversion.

How to convert CSS to Minified CSS

1. 1. Upload — drag your CSS file onto the converter above, or click to browse.
2. 2. Convert — press Convert. Processing happens on secure servers in seconds.
3. 3. Download — your Minified CSS file downloads automatically. No sign-up required.

Convert CSS to Minified CSS from the command line

curl --fail-with-body \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -F "file=@input.css" \
  -F "conversionId=css-minify" \
  https://www.omniconvert.cloud/api/convert -o output.css

The API needs a token from a credit pack, and each API conversion uses one credit. Converting on this page stays free. API documentation