Who it helps
It is intended for frontend developers and designers building responsive typography, spacing, gaps, and component dimensions without stacking many small media queries.
CSS clamp generator
Set two sizes and two viewport boundaries. Get a fluid value that scales between them without breakpoint jumps.
Enter the values you want at the narrowest and widest viewport. The result uses rem for accessible zoom behaviour.
Live previewFluid type
Resize the browser to see the value respond between its minimum and maximum.
Generated CSS
font-size: clamp(1rem, 0.4286rem + 2.8571vw, 3rem);ABOUT THIS TOOL
Use it with context.
The CSS Clamp Generator creates a fluid CSS length that moves between chosen minimum and maximum values across a defined viewport range.
How it works
The tool calculates a linear slope between the two viewport boundaries, converts that slope into a viewport-width term, and combines it with an intercept. CSS clamp() then protects the result with the minimum and maximum limits you supplied.
Privacy
All arithmetic happens locally. The values and generated CSS are not sent to a server or saved after the browser session.
HOW TO USE IT
A practical workflow.
- 01
Choose the smallest and largest values the property should reach.
- 02
Set the viewport widths where fluid scaling should start and stop.
- 03
Copy the generated clamp() declaration into the relevant CSS property.
- 04
Test intermediate widths and zoomed text; adjust the limits if the visual relationship stops being useful.
COMMON PROBLEMS
What the output cannot decide for you.
Minimum and maximum are reversed
Decide whether the value should grow or shrink with the viewport and enter boundaries that describe that intention.
Viewport units are used without limits
A bare vw value can become unusably small or large. clamp() keeps the fluid part inside deliberate bounds.
The formula replaces testing
Fluid mathematics cannot judge line length, wrapping, zoom behaviour, or component constraints. Verify the result in the real layout.