CSS Custom Property Polyfill Checker - Online IE11 Fallback
Paste your CSS and see a static fallback version where var() is replaced with the default value. For legacy support.
UD5 Toolkit
Paste your CSS and see a static fallback version where var() is replaced with the default value. For legacy support.
Define a set of colors for light and dark themes. Get the CSS custom properties snippet. Toggle live.
Pick colors for the shadcn/ui design system and generate the complete CSS variable theme file. Copy into your project.
Paste a list of hex colors and generate CSS custom properties for them. Create your design token file instantly.