⌘ K
css → js style · camelCase · comments stripped · live

Convert CSS to a JS style object

Paste raw CSS declarations and get a JavaScript object with camelCased keys and JSON-safe string values — ready for React inline styles or styled-components.

CSS → JS Object
Input
137 B
6 lines
Output
128 B
7 lines
Status
ready
live
Ratio
0.93×
out/in
input · css declarations
output · js style object
{
  backgroundColor: "#1f2937",
  fontSize: "14px",
  borderRadius: "4px",
  padding: "8px 12px",
  textTransform: "uppercase"
}
Quick Start

How CSS becomes a JS object

Block comments are removed, declarations split on semicolons, each property camelCased and each value quoted as a JSON string. The output drops straight into a React style prop or styled-components rule.

  1. 01

    Paste declarations

    Just the property/value pairs — no surrounding braces or selectors needed.

    Parsing is strict-but-tolerant — comments and trailing commas are accepted on input where the source format historically permits them; output stays canonical.

    inputstricttolerantliveparse
    in · sourcecss · live
    color: red;
font-size: 14px;
    loaded · parsedtarget · ready
  2. 02

    Comments stripped

    Block comments are removed before parsing so they never leak into the object.

    Conversion preserves type information where the target supports it (numbers stay numeric, booleans stay boolean) so the destination parser never has to re-coerce.

    cleantype-preservinglosslesslivememoised
    /* */ · optionsdrop · live
    /* note */ → (gone)
    options applied · liveround-trip
  3. 03

    camelCase keys

    background-color becomes backgroundColor; the value stays exactly as you wrote it, JSON-quoted.

    Re-encoding is idempotent: running output back through the same converter produces the same bytes, which keeps round-trips git-friendly.

    caseidempotentround-tripdiff-cleandeterministic
    key · convertedcamel · ready
    backgroundColor: "#1f2937"
    converted · livediff-clean
  4. 04

    Copy or download

    Paste into a React style prop, a styled-components template, or any JS object literal.

    Copy writes via navigator.clipboard.writeText; downloads use the target’s native MIME so editors apply the right syntax highlighting on open.

    exportclipboardtarget MIMEblobclient-side
    ✓ · copiedready · done
    ✓ Copied
    shipped · ready to shipsuccess
Pro tips

Converting between formats, safely

Pick the strictest source format

Lossy formats hide bugs. Choose JSON or YAML as your source-of-truth, convert downstream as needed.

Round-trip in CI

If your converter is idempotent, your CI can verify A → B → A equals the original. Catches subtle data loss.

Numbers vs strings differ

YAML/TOML have a number type; CSV doesn’t. Quote IDs in CSV to keep leading-zero values intact.

Watch character encoding

Source format may be Latin-1 / Windows-1252; target should be UTF-8. Convert encoding before structure.

Preserve comments where you can

YAML and TOML support comments. Don’t silently drop them — they often encode intent.

Schema-aware beats blind

Use a schema to guide conversion. Field types, required-ness, and defaults survive better with structure.

Related toolsInline Styles to CSSHTML to JSXSVG to JSXBootstrap to TailwindCSS UnitsHTML to Pug
Use Cases

When to convert CSS to JS

React, styled-components, JSS, Emotion.

Inline styles

Wire a designer's CSS into a React style prop. Type information survives: numbers stay numeric, booleans stay boolean, strings stay strings. The destination parser doesn't have to re-coerce, which avoids the "'true' becomes "true"" bug class.

round-trip safe

styled-components

Bootstrap a styled-components rule from a CSS snippet. Run output back through the inverse converter to verify idempotent round-trips in CI. A → B → A should produce byte-identical input — if it doesn't, you've found data loss.

type-preserving

JSS / Emotion

Migrate plain CSS into a CSS-in-JS object literal. Comments and metadata survive where the target format supports them (YAML, TOML, HCL). The tool doesn't silently drop intent-encoded annotations, which keeps your config self-documenting.

schema-aware

Email templates

Generate inline-style objects for email components. Pair with a schema (JSON Schema, OpenAPI, Zod, Pydantic) to catch shape drift on either side. Catch breaking changes at conversion time rather than at runtime in production.

lossless

Design tokens

Snapshot a design token rule into JS for theming. Output respects target-format conventions: quoting in CSV, indent in YAML, brackets in JSON. Existing parsers don't need patches, and the result drops into legacy pipelines unchanged.

diff-clean

Storybook

Build story-level overrides from existing CSS rules. Encoding-aware: handles UTF-8 vs UTF-16 vs Latin-1 / Windows-1252 transparently. The character-set surprise that breaks "works on my machine" doesn't apply here.

spec-grade
FAQ

Frequently asked questions

Yes — -webkit-transform becomes WebkitTransform (the React-friendly form).
Kept inside the string value. React inline styles do not honour !important, but styled-components do.
Yes — line breaks inside values are flattened to a single space inside the JSON string.
It guarantees correct escaping for quotes, commas and special characters.
No. Conversion runs locally in your browser.
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