CSS Clamp Generator

Generate fluid CSS clamp() values for responsive typography and spacing from minimum, maximum and viewport sizes.

Local processing

Min size (rem)

Max size (rem)

Viewport min (px)

Viewport max (px)

Output CSS

clamp(1rem, calc(1rem + (2 - 1) * ((100vw - 320px) / (1200 - 320))), 2rem)

What is CSS Clamp Generator?

The CSS clamp() function keeps a value between a minimum and a maximum while scaling linearly with the viewport. This generator turns a minimum size, a maximum size and a viewport range into a ready-to-paste clamp() expression for fluid typography and spacing.

How It Works

The slope is calculated as (max - min) / (viewportMax - viewportMin). The preferred value becomes min + slope multiplied by (100vw - viewportMin), and the final expression is clamp(min, preferred, max). Inputs are validated so the minimum never exceeds the maximum.

Common Use Cases

Fluid responsive headings without media queries
Spacing scales that grow with the viewport
Design tokens that stay readable on phones and desktops
Preventing text from becoming too small or too large

Technical Details

Outputs clamp(min, calc(min + slope * (100vw - minViewport)), max) in rem and px. All arithmetic runs locally in the browser; nothing is uploaded.

How to Use

Enter your input above. The result updates automatically. Use the copy button to copy the result.

Privacy

All processing happens in your browser. Your data is never uploaded to any server.

FAQ

Is clamp() supported in modern browsers?

Yes. clamp() is supported by all current versions of Chrome, Edge, Firefox and Safari, including mobile browsers.

Is my data uploaded to a server?

No. Everything runs locally in your browser. Your input never leaves your device.

Does CSS Clamp Generator work on mobile?

Yes. The interface is responsive and works in modern mobile browsers without installing an app.

CSS Clamp Generator