CSS to JS Object Converter
Convert CSS declarations into JavaScript style objects for React, JSS, or CSS-in-JS with camelCase keys and numeric unitless values. Free, in-browser, no upload.
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What is CSS to JS Object Converter?
The CSS to JS Object Converter is a free browser tool that turns CSS declarations into JavaScript style objects: a flat camelCase object for React inline styles, a selector-keyed object, or a CSS-in-JS template literal.
Key Benefits
- Move CSS into React style props without retyping properties by hand
- Get camelCase keys and numeric unitless values right every time
- See warnings for duplicate and malformed declarations instead of silent data loss
- Stay private: parsing runs entirely in your browser with no uploads
Common Use Cases
- •Converting a stylesheet snippet into a React style object
- •Building style dictionaries for component libraries and design tokens
- •Preparing styled-components or JSS blocks from existing CSS
- •Auditing CSS for duplicate properties before a refactor
How to Use the CSS to JS Object Converter
- Paste CSS: Paste a stylesheet or a snippet into the input, or load the sample CSS to try the tool.
- Choose the output format: React inline style for style props, selector-keyed object for style dictionaries, or a template literal for styled-components.
- Review the JavaScript output: Check the camelCase keys, numeric unitless values, and any warnings about duplicate or malformed declarations.
- Copy or download: Copy the object to the clipboard or download it as styles.js. Everything runs in your browser.
Key Features
- Three output formats: React inline-style object, selector-keyed object, and template literal
- Correct camelCase keys including -webkit and -moz vendor prefixes
- Unitless properties such as z-index, opacity, and font-weight stay numeric
- Duplicate declarations merge last-wins like the CSS cascade, each with a warning
- Live conversion while you type, with copy and .js download - nothing is uploaded
Frequently Asked Questions
Which output format should I use for React?
Use the React inline style object for style props on DOM elements and components. Keys are camelCase (backgroundColor) and unitless values stay numbers, exactly what React expects.
How are duplicate CSS properties handled?
Like the CSS cascade: the last value wins. Each duplicate is reported in the warnings list so you can spot conflicts before pasting the object into code.
Does it convert keyframes and pseudo-elements?
Selectors such as ::before are converted in the selector-keyed format, and @-rule blocks are flattened with a warning. Complex keyframe timelines are better written in CSS or a CSS-in-JS library directly.
Is my CSS uploaded anywhere?
No. Parsing and generation run entirely in your browser with JavaScript. The tool works offline once the page has loaded.