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🔠 Clamp() Font Generator

Build fluid typography with ease. Enter min/max font sizes and viewport breakpoints to produce a precise CSS clamp() font-size formula with live preview.

Clamp() Responsive Font Generator

Generate fluid typography values that smoothly scale between viewport breakpoints. Enter the smallest and largest font sizes, choose your min/max viewport widths, and instantly copy a ready-to-use CSS clamp() formula.

Font sizing

Unit

Minimum font size

Maximum font size

Base font size (px)

Viewport breakpoints

Target widths in pixels where the font should hit the min and max sizes.

Minimum viewport width

Maximum viewport width

Preview text

Live preview

Drag the viewport slider to see how the clamp() value responds.

2.063rem (33px)

360px900px1440px

Responsive typography that scales with clamp()

Generated CSS

font-size: clamp(1.125rem, calc(0.5rem + 0.1736vw), 3rem);

Fluid range1.125rem → 3rem

Slope0.1736rem/vw

Intercept0.5rem

Viewport span360px → 1440px

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