CSS Beautifier: Format and Unminify CSS Online

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FREE TOOL · NO SIGN-UP





This CSS beautifier turns minified or messy stylesheets into clean, indented code with one declaration per line. It is for front-end developers, WordPress site owners and SEOs who need to read or edit CSS pulled from a live site, a plugin or a theme. Paste your CSS, pick an indent, click Beautify CSS, and copy readable code in seconds.





It runs entirely in your browser. Your code is not uploaded anywhere, and comments and quoted strings come through unchanged.













What a CSS Beautifier Does





Minified CSS is written for machines: no line breaks, no indentation, often thousands of rules on a single line. A beautifier rebuilds the layout so people can work with it.





Restoring line breaks and indentation





The tool puts each selector on its own line, opens the block with a brace, then places every declaration on a new indented line ending in a semicolon. Nested blocks, such as rules inside @media queries or @supports, get an extra level of indentation so you can see what belongs where. Comma-separated selectors like a:hover,a:focus are split onto separate lines, and a space is added after each colon between property and value. A blank line separates top-level rules, so you can scroll through a long file and spot sections quickly.





Formatting without changing rules





Beautifying only changes whitespace and adds a missing final semicolon where the last declaration in a block lacks one. Selectors, properties, values and the order of rules stay exactly as they were, so the browser renders the page the same way. Comments and quoted strings, such as content: "→" or font names with spaces, are protected during formatting and put back untouched. That matters because a careless formatter that edits inside strings can break icons or font stacks.













How to Beautify CSS





Four short steps take you from a wall of code to a readable stylesheet.





Step 1: Paste CSS





Copy CSS from a .min.css file, a <style> block, your browser’s DevTools or a plugin’s settings, and paste it into the CSS box. Plain CSS works best. SCSS with simple nesting will usually format fine, though mixins and functions are kept as written. Click Clear to empty the box between files.





Step 2: Choose indent style





Pick 2 spaces, 4 spaces or Tab from the Indent menu. Match your project’s existing style so your version control diff only shows real changes. If you are not sure, open another stylesheet from the same project and copy whatever it uses.





Step 3: Format





Click Beautify CSS. The result panel shows the formatted code, and the stats bar shows input and output character counts. Output is longer than the input because line breaks and indentation are added back. Scan the result for any odd breaks, which usually point to a syntax error in the original, such as a missing closing brace.





Step 4: Copy or download





Click Copy to put the formatted CSS on your clipboard, or Download to save it as style.css. Paste it into your editor, child theme or Additional CSS panel. When the edits are done and you are ready to ship, compress it again with the CSS Minifier.













Reading Minified CSS from Live Sites





Most CSS you find on production sites is minified, so beautifying is often the first step when debugging styles you did not write.





Pulling CSS from DevTools





In Chrome, Edge or Firefox, open DevTools with F12, go to the Sources or Network tab and find the stylesheet. Many browsers offer a pretty print button (often shown as {}) that formats the file inside DevTools. That is handy for reading, but copying out a formatted, editable version is easier with a dedicated beautifier. You can also right-click an element, choose Inspect and look at the Styles panel to see which rules apply, then search the beautified file for those selectors to find their full context.





Source maps vs beautifying





A source map links compiled CSS back to the original source files, such as SCSS partials, with their real file names, line numbers and comments. If a site ships source maps, DevTools can show you the original code, which is better than any beautified output. Beautifying cannot recover variables, mixins or partial structure that a build tool flattened. Use source maps when you own the project and have access to the build, and a beautifier when you only have the compiled file.













Formatting Standards for Teams





On a team, consistent formatting keeps code reviews focused on what changed rather than how it was typed.





Prettier and Stylelint





Prettier is a widely used code formatter that supports CSS, SCSS and Less. It applies one consistent style on save or in a pre-commit hook. Stylelint is a linter: it catches errors such as invalid properties, duplicate selectors and unknown units, and it can enforce rules like lowercase hex colors. Many teams run both. An online beautifier is useful for quick, one-off jobs outside the project, such as reading a vendor stylesheet.





Property ordering conventions





Teams often agree on an order for properties within a rule. Common choices are alphabetical, or grouped by type: positioning, box model, typography, then visual effects. This tool does not reorder properties, because changing order can alter which declaration wins when two set the same property. Use a Stylelint ordering plugin if you want enforced ordering.













Beautify for Editing, Minify for Production





Readable CSS and fast CSS are different files with the same rules.





Build pipelines





In a typical workflow, you write readable source CSS, then a build step with tools such as PostCSS, cssnano or Lightning CSS minifies it for deployment. You never edit the minified file directly. WordPress caching and optimization plugins often do the same job by minifying theme and plugin CSS on the fly.





Impact on Core Web Vitals





CSS is render-blocking by default, so large stylesheets can delay first paint and Largest Contentful Paint. Minifying removes whitespace and comments, and compression shrinks it further. Removing unused CSS usually saves far more than minifying, so audit both.













CSS Formatting Tips and Pitfalls





A few common slip-ups cause most formatting headaches.





Mixing tabs and spaces





Mixed indentation looks fine in one editor and broken in another. Pick one style and set it in .editorconfig.





Lost comments





Minified files often have comments stripped by the build, so beautifying cannot bring them back. This tool keeps any comments still present.





Editing compiled CSS instead of source





If a site uses SCSS or a page builder, edits to compiled CSS get overwritten on the next build. Edit the source instead.













Format Once, Debug Faster





Paste your stylesheet above and get clean, indented CSS you can actually read. For the rest of your front-end code, use the HTML Beautifier and JavaScript Beautifier, then shrink everything for launch with the CSS Minifier. More free developer and SEO tools are on FHSEO Hub.













CSS Beautifier: Format and Unminify CSS Online FAQs









A CSS beautifier reformats CSS code by adding line breaks, indentation and consistent spacing so it is easy to read and edit. It places each selector and declaration on its own line and indents nested blocks. The rules themselves do not change, so the page looks exactly the same in the browser.









To unminify CSS, paste the minified code into a CSS beautifier, choose your indentation and run the formatter. The tool restores line breaks and indentation so each rule is readable. Comments and original variable names removed during minification cannot be recovered, but every selector, property and value comes back readable.









No, beautifying CSS does not change how it works, because browsers ignore extra whitespace and line breaks between rules. Selectors, values and rule order stay the same, so styles apply exactly as before. The only addition this tool makes is a missing final semicolon in a block, which is valid and harmless.









Ship minified CSS to production and keep beautified CSS for editing. Minified files are smaller, so they download and parse faster, which helps page speed. Readable files are easier to debug and review. The usual approach is to edit readable source code and let a build step or plugin minify it.









The best CSS formatting style is the one your whole team uses consistently. A common choice is one declaration per line, 2-space indentation, a space after each colon and a blank line between rules. Tools like Prettier and Stylelint can enforce that style automatically across every file in a project.