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CSS Clamp Generator

Generate fluid clamp() values that scale smoothly between two viewport widths.

To create fluid typography, set the size you want at your smallest viewport and at your largest. The generator solves for the slope and intercept and produces a clamp() value that scales linearly between them, then locks at each end.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

What does clamp() actually do?

It takes a minimum, a preferred value and a maximum, and picks whichever is in range. For typography that means text scales with the viewport but never falls below readable or grows absurdly large — replacing a stack of media queries with one declaration.

How to use the css clamp generator

  1. 1Set the minimum size.
  2. 2Set the maximum size.
  3. 3Set the at viewport width.
  4. 4Set the up to viewport width.
  5. 5Set the root font size.
  6. 6The result appears immediately — copy or download it.

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Put the working css clamp generator on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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