CSS Formatter

Format valid CSS source with a local parser. Up to 100,000 characters.

Free to useNo sign-upRuns in your browser

Enter your details

Enter the inputs, then select Format CSS.

Your result

Enter your details

Result will appear here

How CSS Formatter works

Format valid CSS source with a local parser.

Up to 100,000 characters. Comments are retained. CSS is not executed or checked against a browser compatibility database.

Concept diagram for CSS Formatter, showing css source input and the supported output. — Concept diagram; the three operation images are actual browser captures.

How to use CSS Formatter

Follow the labelled inputs.

Paste your CSS source

Replace the example with CSS rules. This tool formats CSS; it does not accept a complete HTML document.

Format CSS

CSS Formatter: input and settings in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Review the source

Check selectors, braces and declarations before formatting. The source is limited to 100,000 characters.

Format CSS

CSS Formatter: tool result in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Run, review and save

Select Format CSS. Review the formatted CSS source, then copy it or download the result text.

Format CSS

CSS Formatter: review the details in the implemented browser tool — Actual local browser view. Open the image to read it at full size.

Examples and uses for CSS Formatter

Check the supplied example

The starting example demonstrates the supported input format. Format valid CSS source with a local parser.

Format CSS

Developer input and configuration represented by document cards. — Prepare the input. Concept illustration.

Use your own inputs

Use the formatter when reviewing a stylesheet or preparing CSS for an editor.

Format CSS

A developer example flowing from input to reviewed output. — Inspect an example. Concept illustration.

Record a reviewed result

Copy the formatted CSS into your stylesheet, then review its appearance in the page where it will be used.

Format CSS

Developer output handed to the next stage of a workflow. — Use the result in your workflow. Concept illustration.

How to read the result

The output is CSS with consistent spacing and indentation. Formatting does not test styles against an HTML page.

Format valid CSS source with a local parser.

Up to 100,000 characters. Comments are retained. CSS is not executed or checked against a browser compatibility database.

Format CSS Format CSS

A developer result reviewed alongside its source. — Review the returned output. Concept illustration.

Supported input and limits

Check the stated scope before you run it.

Up to 100,000 characters. Comments are retained. CSS is not executed or checked against a browser compatibility database.

The input stays in this browser. Copy result and Download save the same displayed text.

Format CSS Format CSS

Input format and assumptions reviewed for a developer task. — Check format and assumptions. Concept illustration.

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CSS Formatter: common questions

Answers about using CSS Formatter and understanding its results.

Which inputs does this tool accept?

Up to 100,000 characters. Comments are retained. CSS is not executed or checked against a browser compatibility database.

Can I copy or download the result?

Yes. Copy result copies the formatted CSS, and Download saves the same text. Formatting runs in your browser without an account.

Format your CSS source

Check the formatted CSS source, then copy or download it.

Format CSS