CSS Formatter

Format or minify CSS with indentation, media query support, CSS variable preservation, and comment options.

For this tool, processing runs locally in your browser and data is not sent to the server.

CSS Formatter is a free online tool that adds line breaks and indentation to CSS code, making it easy to read and edit. It supports media queries, @keyframes, CSS variables, and optional comment preservation. The tool runs in your browser and does not send data to the server.

What it does

Output

Processing

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How to use

Paste CSS code, a style block from DevTools, a CMS stylesheet, an email template, or a minified CSS fragment.
Choose a mode: format with indentation or minify.
Configure indent size, comment preservation, property sorting, and CSS variable handling.
Copy the result and review warnings if the code contains SCSS/LESS syntax.

More about this tool

CSS Formatter adds line breaks and indentation to CSS code, making styles easier to read, review, and edit. The tool is useful for minified CSS, DevTools output, CMS stylesheets, email template styles, and style blocks from web pages.

You can choose 2 or 4 space indentation, optionally preserve or strip comments, enable alphabetical property sorting (disabled by default to avoid breaking cascade and fallback order), and handle CSS custom properties. The tool formats standard CSS and warns about SCSS/LESS-like syntax without compiling preprocessor code.

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Formats CSS with indentation
Can minify CSS
Supports media queries and @keyframes
Preserves CSS variables
Can preserve or strip comments
Useful for DevTools, CMS, email templates, and style blocks
No registration required

Frequently Asked Questions

What does the CSS Formatter do?

It adds line breaks and indentation to CSS code so styles are easier to read, review, and edit.

Can CSS be minified?

Yes. In minify mode the tool removes insignificant whitespace and line breaks while preserving the meaning of CSS rules.

Are CSS comments preserved?

Yes, when comment preservation is enabled. Comments can be stripped from the output by disabling the setting.

Are @media and @keyframes supported?

Yes. The tool formats nested @media, @supports, and @keyframes blocks with clear indentation.

What happens to CSS variables?

CSS custom properties like --color-primary and var(--color-primary) values are preserved without modification.

Can I sort properties alphabetically?

Yes, but the option is off by default because property order sometimes matters for fallback values and cascade behavior.

Is SCSS or LESS supported?

This tool is intended for CSS. SCSS/LESS-like nesting can be detected and a warning shown, but SCSS or LESS compilation is not performed.

Is this a CSS validator?

No. The formatter makes CSS readable. For strict rule checking, browser compatibility, and best practices, use Stylelint, PostCSS, or a dedicated CSS validator.

Is my data sent to the server?

No. CSS is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.

How to use

Paste CSS code, a style block from DevTools, a CMS stylesheet, an email template, or a minified CSS fragment.

Choose a mode: format with indentation or minify.

Configure indent size, comment preservation, property sorting, and CSS variable handling.

Copy the result and review warnings if the code contains SCSS/LESS syntax.

More about this tool

All processing is done locally in the browser. Your data is not sent to the server.

Runs in the browser
Data is not sent to the server
Formats CSS with indentation
Can minify CSS
Supports media queries and @keyframes
Preserves CSS variables
Can preserve or strip comments
Useful for DevTools, CMS, email templates, and style blocks
No registration required

Frequently Asked Questions

What does the CSS Formatter do?

It adds line breaks and indentation to CSS code so styles are easier to read, review, and edit.

Can CSS be minified?

Yes. In minify mode the tool removes insignificant whitespace and line breaks while preserving the meaning of CSS rules.

Are CSS comments preserved?

Yes, when comment preservation is enabled. Comments can be stripped from the output by disabling the setting.

Are @media and @keyframes supported?

Yes. The tool formats nested @media, @supports, and @keyframes blocks with clear indentation.

What happens to CSS variables?

CSS custom properties like --color-primary and var(--color-primary) values are preserved without modification.

Can I sort properties alphabetically?

Yes, but the option is off by default because property order sometimes matters for fallback values and cascade behavior.

Is SCSS or LESS supported?

This tool is intended for CSS. SCSS/LESS-like nesting can be detected and a warning shown, but SCSS or LESS compilation is not performed.

Is this a CSS validator?

No. The formatter makes CSS readable. For strict rule checking, browser compatibility, and best practices, use Stylelint, PostCSS, or a dedicated CSS validator.

Is my data sent to the server?

No. CSS is processed locally in the browser and is not sent to the server.

Do I need to register?

No. The tool works immediately without registration.