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Client-side ProcessingUpdated 2026-02-11Report issue

Runs fully in your browser. Inputs stay on your device. See recent fixes on changelog.

CSS Beautifier / Formatter

Format and beautify CSS code with configurable indentation.

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Cmd/Ctrl+Enter Primary actionCmd/Ctrl+Shift+L Load sampleCmd/Ctrl+Shift+X Clear/resetCmd/Ctrl+Shift+C Copy result

About CSS Beautifier / Formatter

Format and beautify CSS code with configurable indentation. Beautify and format CSS code online for free. Configurable indentation with consistent style output. Includes minify and validate options in one tool. Applies consistent indentation and style rules across your entire document with one click. Validation mode checks syntax correctness and reports detailed, actionable error descriptions. Everything runs client-side in your browser for maximum speed and privacy — no data is sent to any server, and no signup is required.

Related tools: CSS Minifier, CSS Specificity Calculator, SASS/SCSS to CSS Converter

How to Use CSS Beautifier / Formatter

  1. Paste your code or data into the editor.
  2. Click Format to beautify or Validate to check for errors.
  3. Copy the cleaned output or review any issues found.

Frequently Asked Questions

What is CSS Beautifier / Formatter?
Beautify and format CSS code online for free. Configurable indentation with consistent style output. Includes minify and validate options in one tool.
What validation rules are applied?
Validation checks for correct syntax according to the language or data format specification. This includes balanced brackets, proper quoting, valid escape sequences, and structural integrity of the document.
Does formatting change the data?
No, formatting only affects whitespace, indentation, and line breaks. The actual data content and semantics remain identical, ensuring your code or configuration behaves exactly the same after formatting.
What indentation options are available?
You can choose between spaces and tabs, and configure the number of spaces per indent level (commonly 2 or 4). The formatter applies your chosen style consistently throughout the entire document.
Is CSS Beautifier / Formatter free to use?
Yes, formatting and validation are completely free. There are no usage caps, and no signup or account is ever required.
Is my data safe when using CSS Beautifier / Formatter?
Yes, your code and data stay on your device. All formatting and validation happens locally in the browser with no server communication.

Related Tools

CSS Minifier
Minify CSS code by removing whitespace and comments.
CSS Specificity Calculator
Calculate CSS selector specificity and compare selectors.
SASS/SCSS to CSS Converter
Compile SASS/SCSS code to standard CSS output.