CSS clamp() Generator
Generate a responsive CSS clamp() value for fluid typography and spacing that scales smoothly between a minimum and maximum viewport width. Free, private, instant.
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Make type scale smoothly with the screen
CSS clamp() lets a value grow fluidly between a set minimum and maximum as the screen size changes, instead of holding still and then jumping abruptly at fixed breakpoints. This generator builds a clamp() value for fluid typography or spacing that scales smoothly between the two sizes you specify, so text and gaps stay proportionate at every width. It computes the tricky scaling middle term for you, which is the part that is awkward to work out by hand.
Why fluid beats stepped
With traditional breakpoints, a font size stays completely fixed and then jumps suddenly the instant a width threshold is crossed, which can look jarring and also leaves plenty of awkward in-between sizes at widths that fall between your breakpoints. clamp() instead interpolates smoothly across the whole range, so the text is always perfectly proportionate to the viewport, never too large on a small phone nor too small on a wide desktop, and it typically needs far fewer breakpoints overall. It takes a minimum, a preferred value that scales, and a maximum.
Copy the clamp value
It runs entirely in your browser, so nothing you enter is uploaded and the generated code is yours to paste straight into a project. Because it works client-side, you can iterate freely, regenerating as often as you like without a round trip to any server.
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Frequently Asked Questions
What does CSS clamp() do?
It sets a value that grows fluidly between a minimum and a maximum as the screen changes, instead of jumping at fixed breakpoints.
Why is fluid typography better?
Because breakpoint-based sizes jump abruptly and leave awkward sizes between thresholds. clamp() keeps text proportionate to the viewport at every width.
What three values does clamp take?
A minimum, a preferred value that scales with the viewport, and a maximum. The generator computes the scaling middle value for you.
Does it work for spacing too?
Yes. The same technique makes padding, margins and gaps scale fluidly, not just font sizes.
Is my input uploaded?
No. The generator runs entirely in your browser.
Privacy & Security
All processing happens locally in your browser — nothing is uploaded.
How to Use
Enter min/max sizes and the viewport range; copy the calculated clamp() expression.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
Related Tools
Color Converter
DesignConvert colours between HEX, RGB, HSL, HWB and OKLCH, with alpha support. Runs in your browser and shows the live swatch for each format.
Accessibility Color Contrast Checker
DesignCheck foreground and background colour contrast against WCAG thresholds, with the rules for text size, UI components and states.
Typography Scale Generator
DesignGenerate a modular type scale from a base size and ratio, with fluid clamp() values for responsive layouts.