#224 · Developer & Config Text Tool

CSS Minifier

Compress CSS for faster delivery by removing unnecessary spaces, comments, and redundant syntax. Compare original and minified size, saved bytes, and reduction percentage.

Text Input

CSS minify options

Recent History

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How to use this text tool

  • Paste CSS source code.
  • Choose safe or aggressive minification.
  • Select whether comments and final semicolons should be removed.
  • Run the tool and download the minified CSS.

What this tool does

This CSS minifier prepares stylesheets for production by reducing file size while preserving selectors, declarations, media queries, and browser-readable syntax.

Processing logic: protect quoted strings and URLs, remove comments, collapse whitespace, trim punctuation spacing, shorten zero units, and calculate file-size reduction.

Keep a formatted source file for editing and use the minified version for production delivery.

Example

Try the sample input, run minify css, and compare the before-and-after structure in the result panel.

Use cases

  • Clean code before review or sharing.
  • Prepare structured text for documentation, snippets, or production workflows.
  • Check size, line count, structure, and quality before exporting.

Tips for better output

  • Remove unused CSS for larger savings than whitespace minification.
  • Combine repeated selectors before production builds.
  • Keep license comments if your project requires them.

Processing details

Processing logic: protect quoted strings and URLs, remove comments, collapse whitespace, trim punctuation spacing, shorten zero units, and calculate file-size reduction.

Keep a formatted source file for editing and use the minified version for production delivery.

FAQ

How much can CSS be compressed online?

Compression depends on the original formatting, but removing whitespace and comments often reduces CSS size by 15% to 50%.

Does CSS minification affect page layout?

Safe minification should not affect layout because CSS ignores most whitespace outside strings and special values.

Should CSS comments be removed before production?

Most comments can be removed, but license comments or important build notes may need to remain.

Can I restore minified CSS later?

You can format minified CSS for readability, but original comments and some spacing choices cannot be perfectly restored.

Does CSS minification improve SEO or page speed?

It can improve page speed by reducing transfer size, which may support better user experience and technical SEO.

Tool modules

ModulePurpose
Input parserReads pasted text, uploaded files, or sample data.
Processing engineApplies formatting, minification, generation, or cleanup logic.
Quality reportShows statistics, quality score, and practical recommendations.
Export toolsSupports copy, TXT, CSV, JSON, print, history, undo, and redo.

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