CSS Minifier

Free CSS Minifier — Compress CSS for Faster Page Loads

Large, unminified CSS files slow down page rendering. Every byte of CSS the browser must download and parse before rendering the page adds to load time. Minified CSS can be 30–70% smaller than the original, depending on how much whitespace, comments, and redundant code is present. This free CSS Minifier compresses your stylesheet instantly in the browser.

Paste your CSS code and click Minify. The tool removes all whitespace, line breaks, comments, and unnecessary characters, producing compact CSS that functions identically to the original. Copy the result and use it in your production codebase or deployment pipeline.

CSS minification is a basic performance optimization that every production website should implement. Combined with Gzip or Brotli compression at the server level, minified CSS loads dramatically faster than unoptimized stylesheets.

What Minification Removes

Whitespace. Spaces, tabs, and line breaks between selectors, properties, and values that are required for human readability but unnecessary for the browser to parse.

Comments. CSS comments (/* comment */) are documentation for developers. They are stripped entirely in minified output.

Redundant semicolons. The last property in a CSS rule does not require a trailing semicolon. Minification removes it to save a byte per rule.

Shorthand optimization. Some minifiers convert verbose property declarations to shorthand equivalents (e.g., margin-top, margin-right, margin-bottom, margin-left → margin). This reduces code further.

Related Tools

• JS Minifier – Compress JavaScript files for faster loading.
• HTML Compressor – Minify HTML markup.
• Gzip Compression Checker – Verify server-level compression is active.

Frequently Asked Questions