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CSS Beautifier
Updated: June 2026
Minified CSS ships as one compressed line because that is what browsers want — but it is useless to a human. A CSS beautifier expands that line back into readable rules, one declaration per line, so you can understand a stylesheet you only have in its compiled form.
Free · No upload · Instant in the browser
Unminify a stylesheet in one paste
When the only copy of a stylesheet you have is the minified one in production, beautifying is how you read it. The tool parses the compressed CSS, separates it into rules and declarations, and re-prints each rule as its own indented block with one property–value pair per line. A comma-separated selector group is split so each selector sits on its own line, and nested at-rules are indented beneath their parent.
The styles themselves never change — beautifying only restores the whitespace that minification removed. The output applies exactly the same rules as the compressed input.
What you get back
- One declaration per line, each ending in a semicolon.
- A clean space after every colon, so
color:#333becomescolor: #333. - Selector groups broken onto separate lines for readability.
- Media queries and keyframes indented so their contents are easy to follow.
The result reads like a stylesheet a person wrote, not one a build tool spat out.
Beautify vs minify
Beautifying and minifying are mirror images. Minification strips every optional byte — whitespace, the last semicolon in a block, line breaks — to make the file as small as possible for transport. Beautifying adds those bytes back to make the file as readable as possible for editing. You minify for production and beautify for understanding; this tool does both, so you can round-trip a stylesheet between the two forms whenever you need to.
Comments and quoted values are safe
A naive find-and-replace approach to beautifying CSS breaks the moment a brace or semicolon appears inside a string or comment. This beautifier scans the stylesheet properly: /* … */ comments are kept on their own lines, and quoted values like font names or url() paths are treated as opaque, so nothing inside them is mistaken for structure. That means you can paste real, messy production CSS and trust the output.
Runs entirely in your browser
The beautifier works locally in JavaScript — your stylesheet is never uploaded. Design tokens, unreleased themes and internal class names stay on your machine. Check the network tab while you beautify and you will see no request, or go offline and watch it keep working. Because there is no server round-trip, even a large compiled sheet expands instantly.
Frequently asked questions
How do I beautify minified CSS?
Paste the minified CSS into the tool and keep Beautify selected. It expands the stylesheet into readable rules with one declaration per line.
Can I unminify CSS with this?
Yes. Beautifying is exactly the reverse of minifying — it restores the whitespace and line breaks that minification removed.
Does beautifying change my styles?
No. Only whitespace changes. The selectors, properties and values are identical, so the styles apply the same way.
Is my CSS uploaded anywhere?
No. All processing runs locally in your browser. Nothing is sent to a server and the tool works offline once loaded.