How to Use CSS Formatter

1

Paste your CSS into the input box, whether it is hand-written, minified, or compiled from SCSS.

2

Select an indentation width and choose whether each declaration goes on its own line.

3

Click the "Process" button to rebuild the indentation and normalise spacing around selectors and braces.

4

Copy the formatted stylesheet or download it, and keep it in version control for readable diffs.

Features

Puts one declaration per line so diffs show only the property that changed

Normalises spacing around braces, colons, and semicolons consistently

Indents nested at-rules such as @media, @supports, @font-face, and @keyframes

Never reorders or renames rules, so the cascade and specificity are unchanged

Recovers readable source from a minified production stylesheet

Runs in the browser, so unpublished design tokens stay on your machine

Frequently Asked Questions

No. Whitespace in CSS is only significant inside strings, comments, and a few edge cases, so re-indenting and normalising spacing leaves computed styles identical. The tool never renames a class, drops a declaration, or changes specificity.

It handles the standard CSS dialect that these tools compile down to, which covers variables and nested output once flattened. Syntax that only exists before compilation, such as dollar-sign variables, mixins, and extend rules, is not valid CSS and is left as plain text rather than reformatted.

Yes, free with no account needed, and the formatting runs in your browser so the stylesheet is never uploaded. Unreleased design systems and client themes stay entirely on your machine.

It is the fastest way to understand a third-party theme or a recovered production file. Once beautified you can read the selectors, spot the framework version in use, and see which rules are actually responsible for a layout problem.

Related Tools

JSON Formatter

Format and beautify JSON data with proper indentation.

JSON Validator

Validate JSON data and find syntax errors.

JSON Minifier

Minify JSON by removing whitespace and formatting.

HTML Formatter

Format and beautify HTML code.

HTML Minifier

Minify HTML code to reduce file size.

CSS Minifier

Minify CSS code for production.

About CSS Formatter

A stylesheet that has been edited by a dozen people in a dozen editors ends up with a mix of 2-space and 4-space indentation, declarations jammed several to a line, and inconsistent spacing around colons. The CSS Formatter rewrites all of that into a single predictable style without touching a single declaration value.

Each rule is re-emitted with the selector on its own line, the opening brace at the end of that line, and one declaration per line indented beneath it. Spacing around braces, colons, and semicolons is normalised, and nested at-rules such as @media, @supports, @font-face, and @keyframes are indented according to their depth rather than left as a flat wall of text.

Nothing is reordered, renamed, or removed. Class names stay exactly as written, and the cascade and specificity behave identically after formatting. That makes it safe to run across an entire legacy codebase, and the one-declaration-per-line layout is what turns a CSS git diff from noise into a readable record of the actual change.

When to Use This Tool

Standardising indentation before merging a large CSS refactor
Reading a minified or compiled stylesheet you recovered from a CDN
Reviewing a colleague pull request that changed many unrelated lines
Cleaning up CSS generated by a template engine with inline style blocks
Preparing a stylesheet to paste into a documentation site or a tutorial

CSS Formatter

Result

Results