CSS Formatter & Validator
Fix messy CSS, minify for production, validate syntax. AI can't reliably format code — use our deterministic engine instead.
The Problem We Solve
- AI chatbots mess up CSS formatting and miss syntax errors
- Manually fixing CSS is tedious and error-prone
- Online formatters either require signup or have limits
- Minified CSS is hard to read when debugging
- No way to validate CSS syntax before deployment
Our Solution
- Deterministic formatting engine — always produces correct output
- One-click beautify and minify
- Real-time syntax validation with error highlighting
- Instant copy to clipboard
- Size stats before and after minification
Input CSS
Formatted Output
0
Original Size (bytes)
0
Formatted Size (bytes)
0
Minified Size (bytes)
0%
Compression
Frequently Asked Questions
How is this different from AI chatbots?
AI chatbots often make mistakes when formatting code, adding incorrect syntax or "hallucinating" CSS properties. Our tool uses a deterministic JavaScript engine that always produces correct, predictable output based on established formatting rules.
Is my CSS code sent to a server?
No. All processing happens in your browser using the js-beautify library loaded from CDN. Your CSS never leaves your device, making this completely private and secure for sensitive stylesheets.
What CSS syntax errors can it detect?
The validator checks for missing braces, invalid property names, malformed selectors, unclosed strings, and common typos. It will highlight the line and approximate position of detected issues.
How much can minification reduce CSS size?
Typically 20-40% reduction. Our tool removes all unnecessary whitespace, newlines, and optimizes where safe. You can expect significant savings on large stylesheets.
Does it support SCSS or Sass?
This tool formats standard CSS. For SCSS/Sass, consider using a dedicated preprocessor. However, basic SCSS syntax that is valid CSS will usually format correctly.