CSS Formatter / Beautifier – Format CSS Online
Calcon's CSS Formatter turns minified or messy CSS into clean, readable code. Choose 2 or 4-space indentation and your preferred quote style, then paste your CSS — the formatted output updates instantly. No upload, no signup, entirely browser-based.
Frequently Asked Questions
What is CSS formatting / beautifying?
CSS formatting (also called beautifying or pretty-printing) takes minified or poorly indented CSS and reformats it with consistent indentation, newlines after each rule, and spaces after colons. The result is human-readable code that is functionally identical.
What indent size should I use for CSS?
Both 2-space and 4-space indentation are widely used. Most style guides for CSS prefer 2 spaces for compactness. Choose based on your team's convention or project's .editorconfig setting.
Should CSS use single or double quotes?
CSS accepts both single and double quotes for string values (like font names and url() values). Many style guides prefer single quotes in CSS. What matters most is consistency within your project.
Why is my CSS minified in production?
Build tools like Webpack, Vite, and Parcel automatically minify CSS during the production build to reduce file size. Minified CSS loads faster but is hard to read. Use this formatter to decode it during debugging.
Does this tool handle CSS variables?
Yes. CSS custom properties (variables) like --primary-color: #3b82f6; are treated as regular declarations and formatted correctly with proper indentation.
Does formatting change how the CSS behaves?
No. Formatting only changes whitespace and quote characters, which have no effect on how browsers apply CSS styles. The visual output of your website remains identical.
Can this tool format CSS inside <style> tags?
Paste only the CSS content (without the <style> tags). The formatter expects raw CSS rules, not HTML markup.
Does this tool handle @media queries and nested rules?
Yes. @media queries and other at-rules with nested blocks are handled correctly, with proper indentation at each nesting level.
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