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.
Clamp Value Input
Enter minimum and maximum sizes with a viewport range, and the CSS clamp() code will be calculated automatically.
Preview
Check how the generated clamp() value changes according to the screen size.
Check responsive CSS values that change naturally with the screen size.
Generated Result
Check the calculated clamp() value and CSS code.
Enter values and click Generate Clamp.
Recommended Use Cases
clamp() is especially useful for elements that need fluid size changes in responsive UI.
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 choose input values
- Minimum size: the smallest value to keep on mobile screens.
- Maximum size: the largest value to keep on desktop screens.
- Minimum viewport: the screen width where the value starts increasing.
- Maximum viewport: the screen width where the value stops increasing.
Supported features
- Automatic CSS clamp() calculation
- Minimum and maximum size settings
- Minimum and maximum viewport range settings
- Property selection such as font-size, padding, margin, gap, and border-radius
- rem or px output mode
- CSS variable code generation option
- Responsive preview and estimated value based on the current viewport
- Copy generated CSS code
You can use it for
- Creating responsive heading font sizes
- Setting natural spacing between mobile and desktop layouts
- Adjusting card UI padding, gap, and border radius
- Calculating landing page hero title sizes
- Organizing blog skin body size and spacing
- Designing fluid CSS values for a design system
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.