Responsive CSS Variable Generator

Generate fluid CSS custom properties and helper classes for heading and body type, font sizes, and colours. Customise the viewport range, typefaces, font scales, and palette, then copy the output into your project.

Configure

Viewport
Typefaces

Live preview

Heading sample — The quick brown fox

Body copy sits in this stack so you can judge weight, line height, letter spacing, and measure before you generate CSS. Packing boxes, 1–2–3, and a slightly longer sentence help the rhythm show up.

Heading

Font

Body

Font
Size parameters
Colour parameters
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