CSS3 / PostCSS

Online CSS Formatter (Beautifier & Minifier)

Organize chaotic stylesheets or compress production CSS files for lightning-fast website rendering. Whether you need clean indentation and multi-line rule formatting or compact single-line minification, format any CSS instantly with 100% fidelity.

Fully supports CSS3 variables, media queries (@media), keyframe animations (@keyframes), nested selectors, data URIs, and complex calc() expressions without breaking styles. Includes real-time compression analytics and instant .css file downloads.

Indentation:

Input CSS Stylesheet0 chars · 0 B

Formatted / Minified CSS

0 chars · 0 B

100% client-side parser. Zero execution, zero eval(), completely secure.

AdSense Slot (top-banner)Pre-allocated container to prevent CLS

How It Works (Step-by-Step)

1. Paste CSS Stylesheet

Paste raw, minified, or unformatted CSS rules into the editor, or load sample stylesheet code.

2. Select Format or Minify

Choose "Beautify" (with 2/4 spaces or tabs) for pristine readability, or "Minify" to strip whitespace and comments for production.

3. Copy or Export

Inspect byte savings and compression ratios, then click "Copy CSS" or "Download .css".

Key Features & Advantages

Beautify & Minify in Real-Time

Easily switch between structured multi-line CSS formatting for development and compressed minified code for deployment.

Full Modern CSS3 Support

Safely handles custom properties (--variables), @media queries, pseudo-classes, font-face rules, and data URIs without syntax corruption.

Zero Server Execution

Executes 100% in your browser without transmitting your stylesheets to any third-party server.

Accurate Size Analytics

Displays exact character counts, original vs compressed byte sizes, and bandwidth reduction percentages.

AdSense Slot (in-content)Pre-allocated container to prevent CLS

Frequently Asked Questions

How does CSS minification improve website performance?

Minifying CSS eliminates whitespace, line breaks, and unnecessary comments. This significantly reduces total asset weight, speeding up First Contentful Paint (FCP) and Largest Contentful Paint (LCP).

Does this formatter break media queries or animation keyframes?

No. The tokenizer preserves all CSS block levels, nested selectors, media queries, @keyframes, and base64 data URIs intact.

Is there any risk of code alteration or execution?

No. The tool processes styles strictly as static text strings through a lexical scanner, with zero eval() or dynamic script execution.

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