Free Online Glassmorphism Generator

A glassmorphism generator builds the frosted-glass UI effect with `backdrop-filter`, semi-transparent backgrounds, faint borders and rounded corners, outputting ready-to-paste CSS.

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Glassmorphism preview
CSS
background: rgba(255, 255, 255, 0.25);
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
border: 1px solid rgba(255, 255, 255, 0.20);
border-radius: 16px;

How to Use This Tool

  1. Drag the Blur slider to control how much the background is smeared.
  2. Adjust Background opacity and Border opacity to set the panel and outline transparency.
  3. Drag Border radius to control how rounded the corners are.
  4. Pick a Tint color (usually white for light themes, black for dark).
  5. Click Copy CSS to copy the four declarations.

What Is a Glassmorphism Generator?

Glassmorphism is the frosted-translucent style that became mainstream with macOS Big Sur in 2020 and now appears across web and mobile apps, on signup modals, sidebar menus and notification popovers. The visual recipe is four CSS properties working together: a `background` with low alpha (10–30%) so the layer behind shows through, `backdrop-filter: blur(...)` to smear that background into a soft frosted plate, a 1px `border` with low alpha to suggest a glass edge, and a generous `border-radius` for soft corners.

The effect needs a colorful or busy backdrop to read — over a flat white it disappears. This generator shows a preview over a multi-color gradient so the result reads in context.

Note that `backdrop-filter` is supported in all current browsers but with a -webkit- prefix needed for older Safari; for production, include both. Output is four declarations you can drop into any component.

Frequently Asked Questions

What is glassmorphism?
A UI style using semi-transparent backgrounds with a strong backdrop-blur, a subtle border and soft shadows — the frosted-glass look popularised by macOS Big Sur.
What CSS is generated?
background: rgba(...), backdrop-filter: blur(...px), border: 1px solid rgba(...), border-radius and an optional box-shadow. All sliders update the preview live.
Browser support?
backdrop-filter is supported in all modern evergreen browsers. For older browsers, fall back to a solid semi-transparent background.

Published by the WeGotEveryTool team. We build and test every tool in-house and update pages when the underlying spec, formula, or recommendation changes.

Reviewed: May 2026. Disclaimer: this tool is provided as-is for general informational use. For decisions with material consequences (medical, legal, financial, security) verify results against a qualified professional source.

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