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Clamp() Responsive Font Generator
Build fluid typography with ease. Enter min/max font sizes and viewport breakpoints to produce a precise CSS clamp() font-size formula with live preview.
How to use this tool
- Set minimum/maximum font sizes and viewport widths for your scaling range.
- Choose output units (`px` or `rem`) and adjust base size when using rem.
- Preview the result at different widths and copy the generated `font-size` CSS.
Great for
- Building responsive headings that scale smoothly without media queries.
- Translating design-token type ramps into practical production CSS.
- Explaining `clamp()` behavior to teams with a live interactive preview.
Tips
- Align min/max viewport widths with your core layout breakpoints.
- Pick units that match your project token system and accessibility strategy.
- Reuse generated values via custom properties for consistent typography.
FAQ
- When should I use rem instead of px?
- Use rem when you want typography to respect user/browser base font-size preferences.
- What happens if min and max widths are equal?
- The fluid range collapses to a fixed size, so the preview effectively shows a static font-size.
- Can I paste this into utility-first frameworks?
- Yes. The generated `clamp()` value can be used in arbitrary value utilities or custom theme tokens.
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