CSS Formatter
Beautify and format CSS code with proper indentation.
Input
Output
Beautify and format CSS code with proper indentation.
This free CSS Formatter from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the CSS Formatter
- Paste your input - JSON, regex pattern, JWT, URL etc.
- Pick any flags or options the tool supports.
- Click the action button (Format, Test, Decode).
- Copy the result or download it as a file.
What you can do with the CSS Formatter
- Format and validate API responses while debugging.
- Test regex patterns against real input before deploying.
- Decode JWTs to inspect claims and expiry.
- Generate UUIDs for migrations, tests and seeders.
Why use KX Toolkit's CSS Formatter
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
Bookmark the most-used tools - your browser bookmark bar is faster than retyping the URL every time.
Related Developer Tools
If you find this tool useful, explore the full Developer Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
Does formatting CSS change how my styles apply?
No. The formatter only adjusts whitespace, line breaks, and indentation. Selectors, declarations, and order of rules stay the same, so cascade and specificity are unchanged. The formatted file has identical behavior in every browser; the difference is only that you can read and review it more easily, especially in code-review tools.
How does it handle vendor prefixes like -webkit and -moz?
Vendor prefixes are preserved exactly as written. The formatter does not add, remove, or reorder them - that is the job of Autoprefixer, typically run as part of a build pipeline. If you have stale prefixes for browsers you no longer support, removing them after formatting will shrink the file and cut maintenance noise.
Will it sort CSS properties alphabetically?
Pure formatting does not reorder properties because order can matter - for example longhand declarations after shorthand ones intentionally override the shorthand. Some formatters offer an opt-in property-sort step; only enable it if you understand the cascade implications. Sorting is also subjective and can fight with team conventions, so review changes carefully.
Can it handle SCSS or Less syntax?
A plain CSS formatter parses standard CSS only and may break on nested rules, variables, mixins, and at-rules unique to preprocessors. Use a SCSS-aware or Less-aware formatter for those files - Prettier supports both natively. Running a CSS-only tool on a SCSS file usually produces output that no longer compiles cleanly.
What is the right indentation: tabs or spaces?
Both work - what matters is consistency within a project. Most teams use two spaces because CSS rules nest shallowly and short indents keep lines under 80 characters. Tabs are more accessible because each developer can choose visual width. Configure the formatter to match your project's editorconfig so changes do not produce noisy whitespace diffs.
Why are CSS custom properties left untouched?
Custom properties (CSS variables) follow normal property syntax, so the formatter just indents and aligns them like any other declaration. Their values can include complex expressions and fallback chains that the formatter avoids splitting incorrectly. If a variable definition is hard to read on one line, break it manually and the formatter will preserve the layout.
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