CSS Formatter

What is a CSS Formatter?

A CSS formatter takes minified or inconsistently styled CSS and reformats it with one declaration per line, consistent spacing around braces and colons, and clear separation between rules. This makes stylesheets far easier to read, edit, and maintain.

Our CSS Formatter uses a robust beautification engine that correctly handles selectors, nested at-rules like @media and @supports, comments, and shorthand properties, producing clean and predictable output every time.

How to Format CSS

• Paste your CSS, or click Sample to load an example stylesheet
• Choose 2 spaces, 4 spaces, or tabs for indentation
• Each rule is expanded with one property per line for readability
• Media queries and nested at-rules are indented to show their structure
• Click Copy to copy the formatted CSS to your clipboard

Why Format Your CSS?

Readable CSS is maintainable CSS. When every declaration sits on its own line with consistent indentation, you can scan a rule at a glance, find the property you need, and make changes confidently. Minified CSS, by contrast, hides structure and invites mistakes.

Developers format CSS when inspecting compiled output from preprocessors like Sass, cleaning up styles copied from other sites, reviewing third-party stylesheets, and standardizing formatting across a team. Consistent formatting also produces cleaner diffs in version control.

Privacy

Formatting runs entirely in your browser — your CSS is never uploaded, so the tool is safe to use with proprietary or unreleased styles.

Key Features

• Robust beautification engine that handles selectors, at-rules, and shorthand
• Expands each rule to one declaration per line for readability
• Indents nested at-rules like @media and @supports to show structure
• Indentation options — 2 spaces, 4 spaces, or tabs
• One-click copy of the formatted stylesheet
• 100% browser-based — your CSS never leaves your device

Why Readable CSS Matters

CSS has a habit of growing into a tangled mess, and inconsistent formatting accelerates the decline. When declarations are crammed onto shared lines, spacing around braces and colons varies, and rules run together, even a stylesheet you wrote yourself becomes hard to navigate. Consistent formatting — one declaration per line, predictable indentation, clear separation between rules — turns that into something you can scan quickly, where finding and changing a property is effortless and mistakes stand out.

This matters most when you are working with CSS you did not write: compiled output from a Sass or Less preprocessor, styles copied from another site, a third-party stylesheet you need to understand, or framework-generated CSS. Reformatting it into a clean, standard style lets you read the intent behind the rules and edit confidently. Consistent formatting across a team also produces smaller, clearer diffs in version control, which makes code review faster and reduces merge conflicts.

Why Choose Our CSS Formatter?

This CSS formatter is completely free, needs no signup, and runs entirely in your browser, so your stylesheets are never uploaded to a server. The engine correctly handles the parts of CSS that trip up naive formatters — nested media queries, at-rules, comments, and shorthand properties — producing clean, predictable output every time. It is safe to use with proprietary or unreleased styles because nothing leaves your device.

The CSS Formatter is one of more than 200 free tools on ToopTools. If you work with stylesheets regularly, you can pin it to your personalized My Workspace workspace so it stays beside your other front-end utilities, always one click away. It works on any modern browser, on desktop and mobile.

Is the CSS formatter free?

Yes. It is completely free with no limits and no signup. You can format as much CSS as you like, as often as you like, without ever creating an account.

Can it format minified CSS?

Yes. Paste minified or single-line CSS and the formatter expands it into clean, readable rules with one declaration per line — perfect for understanding and editing compiled or compressed stylesheets.

Does it handle media queries and nested at-rules?

Yes. The formatter understands @media, @supports, and other at-rules, indenting their contents so the nesting and structure of your stylesheet are clear at a glance.

Will formatting change how my styles work?

No. Formatting only changes whitespace and indentation for readability. The selectors, properties, and values are untouched, so the styles behave exactly the same in the browser.

Is my CSS kept private?

Completely. All formatting happens locally in your browser, so your CSS is never uploaded, logged, or stored on a server. It is safe to use with proprietary or unreleased styles.

Common Situations Where Formatting CSS Helps

The most common reason to format CSS is to make compiled or minified output readable again. Preprocessors like Sass and Less, CSS-in-JS tools, and frameworks all emit stylesheets that are optimized for machines, not humans — often minified onto a few long lines. When you need to inspect what was actually generated, debug a specificity conflict, or copy a rule into your own project, formatting it first is what makes that possible.

It is also a great way to standardize messy CSS gathered from many sources. Snippets copied from documentation, answers, and other sites arrive in wildly different styles; running them all through the formatter brings them into one consistent layout that is easy to read and maintain. Teams use it to enforce a shared style so that diffs stay small and code reviews focus on real changes rather than formatting noise.

Tips for Cleaner Stylesheets

• Format third-party and compiled CSS before trying to read or reuse it
• Adopt a consistent indentation across the team to keep diffs small
• Use the formatter to standardize snippets collected from different sources
• Format first, then debug — clean layout makes specificity and nesting issues obvious
• Keep one declaration per line so individual properties are easy to find and change

Does it work with Sass or Less output?

Yes. The formatter works on the compiled CSS that preprocessors like Sass and Less produce, expanding minified or densely-packed output into readable rules. It formats standard CSS, so once your preprocessor has generated a stylesheet, you can format that result for inspection or reuse.

How do I beautify minified CSS?

Paste your minified or messy CSS and the tool instantly re-indents it with one rule per line and consistent spacing, so it is easy to read and edit. It handles media queries and nested at-rules, then lets you copy the formatted output.

Does the CSS formatter work offline?

Yes. Formatting runs entirely in your browser, so once the page has loaded the tool works without an internet connection and your CSS is never uploaded. It is safe to format proprietary stylesheets on your own device.