Developer Design Utility
CSS Clamp Generator
Enter minimum size, maximum size, and viewport range to generate CSS clamp() values for responsive font-size, padding, margin, gap, and more.
Fluid CSS Calculation
Generate clamp() values that scale smoothly between a mobile minimum value and a desktop maximum value.
Live Preview
Check the estimated px value and visual result based on the current viewport width.
Copy-ready CSS
Copy practical CSS code including selector, property, and optional CSS variable output.
STEP 1
Clamp Value Input
Enter minimum and maximum sizes with a viewport range, and the CSS clamp() code will be calculated automatically.
STEP 2
Ready
Preview
Check how the generated clamp() value changes according to the screen size.
Live Preview
Responsive CSS Clamp
Check responsive CSS values that change naturally with the screen size.
STEP 3
Generated Result
Check the calculated clamp() value and CSS code.
Enter values and click Generate Clamp.
STEP 4
Recommended Use Cases
clamp() is especially useful for elements that need fluid size changes in responsive UI.
Hero Title
Landing page titles that stay smaller on mobile and larger on desktop.
Card Padding
Inner card spacing that grows naturally according to screen size.
Grid Gap
Smoothly adjust spacing between mobile and desktop layouts.
Border Radius
Useful when creating softer card-style UI on larger screens.
Help
What is a CSS Clamp Generator?
A CSS Clamp Generator is a free developer utility that helps you create CSS clamp() functions made of a minimum value, preferred value, and maximum value. It is useful for responsive font sizes, spacing, card gaps, border radius, and other styles that should change naturally with screen size.
Basic structure of clamp()
clamp() is written as clamp(minimum, preferred, maximum). It will not become smaller than the minimum value on small screens, will not become larger than the maximum value on large screens, and changes smoothly in the middle range using viewport units.
How to Use
- Enter the minimum size, maximum size, and minimum/maximum viewport range.
- Choose the CSS property, selector, output unit, and whether to include a CSS variable.
- Click Generate Clamp to create the clamp() value and full CSS code.
- Review the preview and current viewport estimate, then copy the generated result.
Common tasks from CSS Clamp Generator users
Users looking for a CSS Clamp Generator, CSS clamp calculator, responsive font-size calculator, Fluid Typography Generator, or responsive CSS value generator usually want to create CSS values that scale naturally between mobile and desktop layouts.
Can clamp() be used only for font-size?
No. It can be used not only for font-size but also for many CSS properties that accept numeric units, such as padding, margin, gap, width, and border-radius.
Which is better, rem output or px output?
In general, rem output is better for accessibility and maintainability. However, if your existing project is based on px values, px output can also be used.
How should I choose minimum and maximum viewport values?
A common mobile baseline is 360px or 375px, and a common desktop baseline is 1200px or 1440px. Adjust them according to your actual project layout.
Is it okay to use clamp() too much?
Using it where needed is fine, but applying it to every property can make the design harder to manage. It is best to apply it first to headings, spacing, and card gaps where responsive changes matter.
Notes
clamp() is widely supported in modern browsers, but it is still a good idea to check your target browser support before applying it. Also, rather than applying it to every property, use it where fluid values are truly helpful, such as font sizes, spacing, and gaps.