Color Theme JSON Preview
Preview a JSON-like theme color object as swatches and CSS custom properties.
What the Color Theme JSON does
Preview a JSON-like theme color object as swatches and CSS custom properties. A design token note can paste primary, surface, and danger colors and see matching variables Adjust the controls and the preview updates immediately, so you can dial in exactly what you want and copy the result straight into your project — no build step and no account.
One thing to keep in mind: This is a lightweight preview and not a full design-token parser.
Private and in your browser
Everything runs locally in your browser. Your input is never uploaded, so the tool stays fast and works offline, and the copy and download buttons always use the current result shown in the output panel.
Frequently Asked Questions
What does the Color Theme JSON do?
Preview a JSON-like theme color object as swatches and CSS custom properties. A design token note can paste primary, surface, and danger colors and see matching variables.
What should I keep in mind?
This is a lightweight preview and not a full design-token parser
Does it upload my input?
No. The Color Theme JSON runs entirely in your browser — your input is never uploaded, and it keeps working offline once the page has loaded.
Practical utilities for front-end design and implementation work.