CSS Minifier Online: Compress CSS with csso Safely
This CSS minifier uses csso to compress pasted CSS beyond removing whitespace. It can merge duplicate selectors, remove overridden declarations, and safely restructure rules. Choose whether to enable restructuring and keep /*! important */ comments, then review the compact output and byte savings. Use it to minify CSS online before shipping or placing CSS in a URL, header, or config value.
CSS Minifier is a browser-based CSS minifier that uses csso to compress stylesheets. Paste or drop CSS into the tool to get a compact result, then review the byte savings. Unlike a whitespace-only compressor, csso can merge duplicate selectors, remove overridden declarations, and restructure rules safely.
Choose whether to enable restructuring and whether to keep /*! important */ comments. These options let you decide how csso handles rule restructuring and important comments while it minifies your input. The tool displays the byte savings so you can compare the size before and after compression.
CSS is a stylesheet language used to describe how web content is presented. Minified CSS keeps the stylesheet content in a more compact form by reducing unnecessary text and applying csso's compression. Developers often minify CSS before shipping it or when they need a shorter value for a URL, header, or config entry.
CSS Minifier runs entirely in your browser: your input is processed on your device and is not uploaded, stored, or sent to a server. After the page has loaded, it works offline without a server dependency. This CSS compression tool is useful for developers and DevOps engineers who want to prepare CSS, review size changes, or choose minification options without leaving the browser.
Step 1: Paste or drop your CSS into the tool. It accepts CSS input for minification.
Step 2: Choose whether to enable restructuring. This option controls whether csso restructures rules during compression.
Step 3: Set whether to keep /*! important */ comments. Use this option when those comments need to remain in the output.
Step 4: Review the compact CSS and the byte savings, then copy the result for your project or config value.
Use case: Shrink CSS before shipping it with an application. csso compresses beyond whitespace removal while safely restructuring rules.
Use case: Compare the original and minified byte sizes to see whether compression meaningfully reduces your CSS payload.
Use case: Create compact CSS for a URL, header, or configuration value where a shorter string is useful.
Use case: Check how enabling restructuring affects the minified output before choosing an option for your stylesheet.
Use case: Keep /*! important */ comments in the output when they need to be preserved during minification.
Use case: Prepare a compact CSS snippet to share or paste into a project without manually removing whitespace.