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Format, beautify, validate, minify, and clean up CSS code online. Format unindented stylesheets, strip comments, auto-repair missing braces/semicolons, compress bundle size, and copy clean CSS with 100% browser privacy.
Paste unformatted CSS into the input editor, upload a .css file, or click "Sample CSS" to test.
Select 2-space, 4-space, Tab, or single-line rule formatting, strip comments, or click "Auto-Repair" to fix syntax errors.
Copy formatted CSS or compressed production CSS bundle directly to clipboard, or download as formatted-himat.css.
Zero server network requests. Your CSS code, custom properties, and design stylesheets stay entirely inside your web browser.
Formats unorganized CSS markup with clean 2-space, 4-space, or Tab indentation and proper declaration hierarchy.
Compresses CSS stylesheets by stripping unnecessary spaces, line breaks, zero unit dimensions, and CSS comments for blazing fast page loads.
Standardizes missing trailing semicolons, normalizes multi-selector line breaks, and cleans up redundant declarations automatically.
Flexibly switch between standard expanded CSS rule blocks and compact single-line CSS rules for lightweight stylesheets.
Live real-time count of total selectors, property declarations, original byte size, compressed size, and compression ratio.
Our CSS Formatter & Minifier tool is open source under HiMat Technology. Inspect the code, star the repo, or submit improvements on GitHub.
HiMat's CSS Formatter & Minifier executes 100% locally in your browser memory. Your CSS stylesheets, custom CSS properties, color variables, and proprietary design system code are never transmitted across the network.
No. The HiMat CSS Formatter & Minifier operates 100% locally in your web browser. Neither your CSS source code nor stylesheet structure is ever transmitted across the network.
The minifier strips unnecessary line breaks, comments, trailing semicolons before closing braces, and multi-space indents, reducing CSS bundle size to improve site speed and Core Web Vitals.
Yes! Our built-in CSS auto-repair normalizes missing closing braces, fixes missing semicolons, and cleans up malformed selector spaces in real time.
Yes, 100% free forever without registration, rate limits, or advertisements.
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HiMat Technologies designs and builds ultra-fast Next.js SaaS platforms, AI web applications, and custom software systems optimized for maximum Core Web Vitals performance.