CSS Beautifier — Format CSS Online Free
Paste minified or messy CSS and get back a clean, readable stylesheet in one click. This free CSS beautifier online uses js-beautify for reliable formatting, with bonus features for alphabetical property sorting and CSS color extraction — making it the ideal tool for developers reviewing third-party stylesheets or standardizing team CSS conventions. You may also want to format the HTML markup or validate JSON data in the same project.
How to Use the CSS Beautifier
- Paste raw, minified, or messy CSS into the left input panel.
- Choose your preferred indent size — 2 spaces, 4 spaces, or tabs.
- Optionally select Alphabetical property sorting to organize declarations consistently.
- Click Beautify CSS or enable Format on Paste for instant results.
- Click Extract Colors to pull all hex and RGB color values out as CSS custom property declarations.
- Download the result as a
.cssfile or copy it to your clipboard.
Key Features
- Powered by the industry-standard js-beautify library for reliable CSS formatting.
- Choice of 2-space, 4-space, or tab indentation to match your project's style guide.
- Alphabetical property sorting: organizes declarations from A to Z within each rule block.
- CSS color extractor: finds all hex and
rgb()/rgba()values and outputs them as numbered--color-NCSS variables with visual swatches. - Minify mode: strips comments, collapses whitespace, and removes trailing semicolons before closing braces.
- Live stats: rule count, property count, and character count.
- Download the formatted stylesheet as a
.cssfile.
Use Cases
Format minified CSS from a production build for debugging
When a production CSS file has a visual bug, minified output is nearly impossible to read. Pasting it into this CSS formatter instantly produces an indented, readable stylesheet you can scan for the problem rule — far faster than trying to interpret a single-line file. For the JavaScript side of the same build, the JS Formatter handles minified bundles just as quickly.
Sort CSS properties alphabetically for large team codebases
Alphabetical property sorting eliminates arguments about property order and makes declarations predictable in large stylesheets. Enable the alphabetical sort option and run any CSS rule block through the formatter to standardize it — pairs naturally with Stylelint's order/properties-alphabetical-order rule.
Extract CSS color values to build a design system
Paste a third-party stylesheet or legacy CSS file and click Extract Colors to instantly inventory every unique color in the stylesheet. The output is a ready-to-use :root { } block with numbered CSS custom properties — the starting point for a consistent color token system.
Minify CSS stylesheets for production deployment
Click Minify to produce a single-line stylesheet with all comments stripped and unnecessary whitespace removed. This reduces CSS file size and page load time, making it ideal for a final review step before deploying static assets.
Beautify CSS code before a pull request review
Inconsistently formatted CSS is hard to review in GitHub diffs. Running your stylesheet through this CSS pretty printer ensures each property is on its own line, making additions and deletions clearly visible to reviewers.
FAQ's
No. CSS formatting only adds whitespace — it does not change selectors, property values, or the cascade order. The resulting stylesheet produces exactly the same visual output as the minified original.
It reorders CSS declarations within each rule block from A to Z. For example, z-index moves to the bottom and background near the top. The visual output is unchanged, but the code is easier to scan and reason about in large stylesheets.
The tool scans the formatted CSS for all hex color values (#xxx and #xxxxxx) and rgb()/rgba() values. It collects unique colors, assigns them numbered CSS custom property names (--color-1, --color-2, etc.), and displays them in a copyable block alongside visual color swatches.
The beautifier can handle many SCSS and Less constructs because js-beautify is quite tolerant, but it is optimized for standard CSS. Nested rules, mixins, and variables may not be indented correctly. For SCSS, use a dedicated SCSS formatter or Prettier with the SCSS plugin.
The Minify button strips all /* */ comments, collapses whitespace to zero, removes spaces around punctuation characters like { } : ; , > + ~, and removes trailing semicolons before closing braces. The result is a single-line stylesheet with maximum compression.
No. All formatting happens entirely in your browser using the js-beautify library running client-side. Your stylesheets never leave your device and are never transmitted to any external server.
Open this page in any modern browser — no download, plugin, or account required. Paste your CSS, click Beautify CSS, and copy or download the formatted result. The entire tool runs client-side.
Readable CSS is not just a matter of personal preference — it directly affects how quickly bugs are found, how easily new team members onboard, and how confidently you can review changes in version control. This free CSS beautifier online handles the mechanical side of code style automatically, letting you focus on the logic of your selectors and the accuracy of your values. Beyond basic formatting, the alphabetical sort and color extraction features make it genuinely useful for design system work and code audits, not just one-off cleanup tasks. Everything runs in your browser, works offline after the first load, and requires no account or installation of any kind.