CSS Minifier Online - Free CSS minifier and beautifier.
Free online CSS minifier and beautifier. Compress CSS to reduce file size or format it for readability. See compression ratio in real time.
How to Use CSS Minifier
- 1Paste your CSS code into the input area.
- 2Choose Minify to compress or Beautify to format.
- 3Click Convert to process.
- 4Copy the result and see compression stats.
Frequently Asked Questions
What is CSS minification?
CSS minification removes unnecessary characters like whitespace, comments, and semicolons from CSS code to reduce file size without changing functionality.
How much can CSS be compressed?
Typical CSS files can be reduced by 20-40% through minification, depending on the amount of comments and whitespace in the original code.
Does minification affect CSS functionality?
No. Minification only removes characters that are not needed for the browser to interpret the CSS correctly. The output is functionally identical to the input.
Found a bug or have a suggestion? Report it on GitHub
Learn More
Guide
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Performance, file size, and best practices.
GuideCSS Compression Techniques
From comments to shorthand properties.
GuideCSS Bundling Tools
Comparing popular minification tools.
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GuideBuild Tool CSS Minification Compared: Vite, Webpack, Rollup, esbuild
Compare CSS minification across Vite, Webpack, Rollup, and esbuild — output size
GuideCSS Minification vs Purging
Understand the difference between minifying CSS and purging unused styles — and
GuideCritical CSS Inlining Guide
Extract and inline above-the-fold CSS to eliminate render-blocking stylesheets.