Productive ToolboxCSS Clamp Generator
Generate responsive CSS clamp() values for typography, spacing, and layouts with live preview
CSS Clamp Generator
Generate responsive CSS clamp() values for fluid typography, spacing, and layouts with live preview and instant code output.
Configuration
Live Preview
Heading Preview
This is a paragraph with fluid font size that scales between viewports.
Scaling Graph
Viewport Simulator
Generated Code
How to Use the CSS Clamp Generator
1. Configure Your Values
Set your minimum and maximum values along with the viewport range where the scaling should occur:
- Min Value: The smallest size your property should be
- Max Value: The largest size your property should be
- Min Viewport: The viewport width where min value applies
- Max Viewport: The viewport width where max value applies
2. Choose Your Property
Select the CSS property you want to make fluid. Options include font-size, padding, margin, gap, width, height, border-radius, and more. Each property has sensible defaults to get you started.
3. Preview in Real-Time
See your clamp value in action with live preview elements. Use the viewport simulator slider to test how your value scales across different screen sizes.
4. Copy Your Code
Get your generated code in multiple formats: plain CSS, CSS variables, SCSS variables, or Tailwind CSS classes. One-click copy makes it easy to use in your projects.
Understanding CSS Clamp()
What is CSS Clamp?
The CSS clamp() function allows you to set a value that scales fluidly between a minimum and maximum value based on the viewport size. It takes three parameters:
clamp(MIN, PREFERRED, MAX)- MIN: The minimum value (lower bound)
- PREFERRED: The ideal value, typically using viewport units (vw)
- MAX: The maximum value (upper bound)
How Clamp Works
The browser evaluates the preferred value and constrains it between the min and max:
- If preferred value < min → use min
- If preferred value > max → use max
- Otherwise → use preferred value
Real-World Example
font-size: clamp(16px, 2vw + 12px, 32px);This creates a font size that:
- Never goes below 16px (mobile readability)
- Scales with viewport width (2vw + 12px)
- Never exceeds 32px (desktop maximum)
Common Use Cases
Fluid Typography
Create responsive text that scales smoothly across all screen sizes without media queries.
h1 { font-size: clamp(2rem, 5vw, 4rem); }Responsive Spacing
Make padding and margins adapt to viewport size for better layouts.
.container { padding: clamp(1rem, 3vw, 3rem); }Flexible Layouts
Create container widths that adapt without breakpoints.
.card { width: clamp(300px, 50vw, 600px); }Fluid Gaps
Make grid and flexbox gaps responsive automatically.
.grid { gap: clamp(1rem, 2vw, 2rem); }Best Practices
Start with Accessibility
Ensure minimum font sizes are at least 14-16px for readability
Test Across Viewports
Use the viewport simulator to verify scaling behavior at all sizes
Use Relative Units
Consider using rem or em for better accessibility and user preferences
Create Typography Scales
Use the scale generator to maintain consistent proportions across headings
Document Your Values
Use CSS variables to make clamp values reusable and maintainable
Frequently Asked Questions
What is CSS clamp() and why should I use it?
CSS clamp() is a function that creates fluid, responsive values that scale between a minimum and maximum based on viewport size. It eliminates the need for multiple media queries and creates smoother transitions between breakpoints, resulting in more maintainable and elegant code.
How is clamp() different from min() and max()?
While min() returns the smallest value and max() returns the largest, clamp() combines both by constraining a preferred value between minimum and maximum bounds. Think of it as min(MAX, max(MIN, PREFERRED)) in a single function.
What browsers support CSS clamp()?
CSS clamp() is supported in all modern browsers including Chrome 79+, Firefox 75+, Safari 13.1+, and Edge 79+. For older browsers, you can provide fallback values or use PostCSS plugins to generate media query alternatives.
Can I use clamp() with any CSS property?
Yes! Clamp() works with any CSS property that accepts length values, including font-size, padding, margin, width, height, gap, border-radius, and more. It's particularly useful for typography and spacing.
Should I use px, rem, or em for clamp values?
It depends on your use case. Use px for precise control, rem for scalability with user font preferences, and em for values relative to parent elements. For typography, rem is often the best choice for accessibility.
How do I calculate the preferred value?
The preferred value uses a linear interpolation formula: slope × viewport + intercept. Our generator calculates this automatically based on your min/max values and viewport range, so you don't need to do the math manually.
Advanced Tips
Combining with CSS Variables
:root {
--fluid-text: clamp(1rem, 2vw + 0.5rem, 2rem);
--fluid-space: clamp(1rem, 3vw, 3rem);
}
h1 { font-size: var(--fluid-text); }
.container { padding: var(--fluid-space); }Creating Design Systems
Use clamp() to build entire fluid design systems with consistent scaling ratios:
--space-xs: clamp(0.5rem, 1vw, 1rem);
--space-sm: clamp(1rem, 2vw, 2rem);
--space-md: clamp(1.5rem, 3vw, 3rem);
--space-lg: clamp(2rem, 4vw, 4rem);
--space-xl: clamp(3rem, 6vw, 6rem);Fallbacks for Older Browsers
h1 {
font-size: 2rem; /* Fallback */
font-size: clamp(1.5rem, 4vw, 3rem);
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