CSS Clamp Generator

How to use

1. Set Min / Max Size — Choose the smallest and largest pixel sizes the value should ever take.
2. Set Viewport Range — Define the viewport widths where scaling starts and stops.
3. Copy the clamp() — Paste the generated declaration directly into your CSS.

The CSS Clamp Generator produces fluid, responsive clamp() expressions so your typography and spacing scale smoothly between two viewport widths — no media queries needed.

Features

• Min / max size input in pixels (auto-converted to rem).
• Min / max viewport width definition.
• Live preview of the value at any viewport width.
• One-click copy of the complete CSS declaration.

How clamp() works

The function takes three values: a minimum, a preferred (often using viewport units), and a maximum. The browser picks the preferred value but clamps it within the bounds — perfect for fluid type without media-query sprawl.

Frequently asked questions

Why not just use vw?

Pure vw scales without bounds — text becomes huge on 4K monitors and unreadable on tiny screens. clamp() locks the result between a min and a max, while still scaling fluidly in between.

Why rem instead of px?

rem respects the user's root font-size setting, which matters for accessibility. Px ignores that preference and is therefore not recommended for type-sizing.

Does clamp() work in all browsers?

Yes — it is supported in Chrome, Edge, Firefox, Safari and Samsung Internet since 2020 (>97% global).

Can I use this for padding, margin, or gap?

Absolutely. clamp() works on any length value — spacing, radius, line-height, even grid-template sizes.

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