CSS to JSON Converter
Convert CSS rules to JSON objects for CSS-in-JS libraries like styled-components, Emotion, and React Native StyleSheet. Instant, free, and runs entirely in your browser.
How It Works
Paste Your CSS
Paste your CSS rules into the input editor. Supports selectors, media queries, pseudo-classes, and vendor prefixes.
Choose Options
Select camelCase or kebab-case keys, numeric value handling, and an optional wrapper like StyleSheet.create().
Copy the JSON
Your CSS is instantly converted to JSON. Copy the result or download it as a .json file.
Why Convert CSS to JSON
CSS-in-JS Compatibility
Use your existing CSS with React, Vue, or any CSS-in-JS library like styled-components and Emotion.
React Native Ready
Wrap output with StyleSheet.create() for instant React Native compatibility with your existing styles.
Type-Safe Styles
JSON style objects can be typed with TypeScript for compile-time style checking and autocompletion.
Easy Migration
Migrate legacy CSS codebases to modern CSS-in-JS one file at a time without rewriting from scratch.
Supported Conversions
FAQ
Is this tool free to use?
Yes, the CSS to JSON converter is completely free with no signup required. Just paste your CSS and get instant results.
Does it handle media queries?
Yes, media queries are converted to nested JSON objects. The @media rule becomes a key, and its child rules are nested inside.
What about pseudo-classes like :hover?
Pseudo-classes are preserved in the selector key. For example, .button:hover becomes a ".button:hover" key in the output JSON.
Is my CSS sent to a server?
No, all conversion happens entirely in your browser. Your CSS never leaves your machine there are no API calls or server processing involved.
Can I use this for React Native?
Yes! Select the "StyleSheet.create()" wrapper option to get output formatted for React Native. Remember that React Native only supports a subset of CSS properties.
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