JSON Formatter & Validator
Validate, pretty-print, and minify JSON payloads safely using native JSON.parse and JSON.stringify with detailed syntax error reporting.
CSS Minifier
TokenizerCompress CSS stylesheets using a string-aware tokenizer that removes comments and redundant whitespace without breaking calc(), strings, or data URIs.
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How to Use CSS Minifier
- 1Paste your CSS stylesheet into the input editor.
- 2Click 'Minify CSS' to run the state-machine tokenizer.
- 3Review the original byte size, minified byte size, and savings percentage.
- 4Click 'Copy Minified CSS' or 'Download .css' to save your compressed stylesheet.
Key Features & Privacy
- ✦Character-by-character state-machine tokenizer that tracks single-quoted strings, double-quoted strings, and `url(...)` tokens so inner content is never corrupted.
- ✦Preserves required spaces around `+` and `-` operators inside `calc()`, `clamp()`, `min()`, and `max()` functions.
- ✦Strips `/* ... */` comments, collapses whitespace around `{ } : ; , > ~`, and removes unnecessary trailing semicolons before `}`.
- ✦Instant size comparison and downloadable `.css` output.
Frequently Asked Questions
Why do naive regex CSS minifiers break `calc(100% - 20px)` or `content: 'a b'`?
Naive regexes strip spaces around `-` inside `calc()` (turning it into an invalid negative token) or collapse spaces inside quoted `content` strings. Our state-machine tokenizer preserves quoted strings and functional math spacing.
Can I keep license comments (`/*! ... */`)?
Yes, enable the 'Preserve `!` License Comments' checkbox to keep `/*! ... */` headers intact.
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