CSS to Style Object — Convert CSS to a React Inline Style Object

Real-world use cases

• Drop a designer's CSS straight into a React component

  A designer hands you a snippet of CSS for a card: padding, a box shadow, a border radius, a couple of vendor-prefixed lines. Paste the whole thing, get a `style` object with every key already camelCased and the `-webkit-` prefix capitalised correctly, and paste it onto your `<div style={{ ... }}>`. No hand-renaming twelve properties and no silent drop because you typed `MsFlex` instead of `msFlex`.

• Migrate a legacy inline-styled component to objects

  You inherit a component still using a stringified style or an old CSS file, and you are moving it to typed inline styles. Copy each rule's declarations in, flip the bare-numbers switch so `zIndex` and `lineHeight` come out as numbers, and you get an object that type checks against React's `CSSProperties` without a wall of red squiggles from quoted numbers where React wants numerics.

• Convert DevTools computed styles for a quick prototype

  You are reproducing a layout you found on a live site. Open DevTools, copy the declarations from the Styles pane, and paste them here. The parser handles the trailing semicolons, the `rgb(0, 0, 0)` commas and the `url(...)` values without choking, and hands you an object you can drop into a throwaway React sandbox to see the look in seconds.

• Build a token preview or a styled-component fallback

  You keep design tokens as CSS custom properties and want them mirrored into a JS object for a preview surface. Paste the `--brand`, `--space` and `--radius` lines and the tool keeps each as a quoted string key, `'--brand': '#06e6d7'`, exactly the shape React forwards to the DOM so your `var(--brand)` references still resolve at runtime.

Common pitfalls

• Leaving property names hyphenated. React reads style keys as camelCase IDL names, so a key written background-color is treated as a literal custom string and quietly ignored and the style never applies. Always camelCase, which this tool does for you.

• Capitalising the ms vendor prefix. Every other prefix capitalises its first segment, so people write MsFlex by analogy, but React keeps Microsoft's prefix lowercase as msFlex. The wrong case means the rule is dropped with no error.

• Quoting numbers React wants bare, or leaving bare a value that needs a unit. A lineHeight of 1.5 should be a number, width 100 silently becomes 100px, and a quoted width of 100 is invalid. Match each property, with unit-less numerics as numbers and anything carrying a unit as a quoted string.

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