CSS Beautifier Online — Free CSS Formatter

Reformat compressed or messy CSS into clean, consistently indented source. One declaration per line, configurable indent, comments preserved — 100% in your browser.

Indent:

Input CSS

Beautified CSS

What is a CSS Beautifier?

A CSS beautifier takes a stylesheet that has been minified, copied from DevTools, or written in a single line and reformats it with consistent indentation, one declaration per line, and predictable spacing around braces and colons. It does not modify selectors, property names, or values — only whitespace and line breaks.

Beautified CSS is dramatically easier to review, debug, and version-control. The OpenFormatter CSS beautifier runs entirely in your browser — making it safe for stylesheets that contain internal class names, design-token comments, or unreleased component styles you cannot upload to a third party.

How to beautify CSS online — 4 steps

Paste your CSS. Drop in minified production CSS, output from browser inspector, or any compressed stylesheet.
Pick indentation. Choose 2 spaces, 4 spaces, or tab from the toolbar to match your team's convention.
Click Beautify. The tool reformats the CSS client-side: one rule per line, indented inside braces, blank lines between blocks.
Copy and review. Use Copy to grab the result and paste it back into your editor or pull request.

Before and after — beautification example

Input — minified

.btn{display:inline-block;padding:12px 24px;background:#2563eb;color:#fff;border-radius:6px}.btn:hover{background:#1d4ed8}

Output — beautified

.btn {
  display: inline-block;
  padding: 12px 24px;
  background: #2563eb;
  color: #fff;
  border-radius: 6px;
}

.btn:hover {
  background: #1d4ed8;
}

Consistent Formatting

Adds line breaks between rules, indents declarations inside braces, and normalises spacing around colons and semicolons — every time.

Rendering Unchanged

Selectors, properties, values, !important flags, vendor prefixes, and source order are preserved exactly. Visual output is identical.

Client-Side Privacy

CSS is parsed and reformatted in JavaScript inside your browser. Nothing is uploaded — internal styles stay private.

Common use cases

check_circleReformatting minified third-party CSS so you can read and patch it locally
check_circleCleaning up CSS copied from browser DevTools Computed or Styles panes
check_circleNormalising inconsistent indentation across a team codebase before merging
check_circleBeautifying auto-generated CSS exported from design tools (Figma, Sketch)
check_circleInspecting compiled SASS/LESS output to confirm what shipped to the browser
check_circlePreparing CSS snippets for documentation, MDX, or developer blog posts
check_circleReformatting style attributes pulled from React/Vue inline-style strings
check_circleAuditing critical CSS extracted by build tools before inlining in <style>

Beautifier vs. minifier — they reverse each other

A beautifier and a minifier are exact inverses for whitespace. Beautify when you need to read or review CSS — most often after pasting minified production output or DevTools snippets. Minify when you are shipping CSS to production. The OpenFormatter CSS Minifier compresses; this beautifier expands. Selectors, properties, and values are preserved by both — only formatting changes.

Need to convert or compile CSS?

OpenFormatter ships convert tools for CSS, LESS, SCSS, SASS, and Stylus — all browser-side.

CSS Minifier CSS to SCSS All CSS Tools

Frequently Asked Questions

What does the CSS beautifier do?

The CSS beautifier reformats CSS source by adding line breaks between rules, indenting each declaration, and normalising the whitespace around braces, colons, and semicolons. It does not change selectors, properties, or values, so the rendered output is identical to the input.

How is CSS beautifying different from CSS validation?

Beautifying changes only formatting — it does not check that property names are valid or values are well-formed. For correctness checks against the W3C CSS specification, use a dedicated CSS validator. The beautifier is purely a presentation layer.

Can I choose the indentation style — tabs vs spaces?

Yes. The toolbar above the editor lets you switch between 2-space (default), 4-space, and tab indentation. Pick the style that matches your project EditorConfig or Prettier configuration.

Will the beautifier preserve my CSS comments?

Yes. /* block */ comments are kept and placed on their own lines so they remain readable. Authoring notes about TODOs, browser hacks, or design tokens stay attached to the rules they describe.

Does the beautifier work on SCSS, SASS, or LESS source?

It is built for plain CSS syntax. SCSS and LESS share the brace syntax and will format reasonably, but preprocessor-only constructs (@mixin, $variables, parent selectors with &) may not get optimal layout. For preprocessor source, beautify after compiling to CSS.

Is my CSS uploaded to your servers?

No. Formatting runs entirely in JavaScript inside your browser. Stylesheets containing internal class names, design tokens, or unreleased UI never leave your device. Verify in DevTools Network — no requests fire when you click Run.

Why does my beautified CSS look different than Prettier output?

Prettier applies opinionated rules like alphabetising vendor prefixes and breaking long lines. This beautifier applies only universal CSS conventions: one rule per line, indented declarations, blank lines between blocks. For full Prettier output, run prettier --parser css in your project.

How is this beautifier different from CSS Pretty Print?

They are the same operation under different names. Some teams say "beautify", others say "pretty print". Output is identical. CSS Beautifier is the canonical tool — CSS Pretty Print exists for users who search the alternate vocabulary.