Create frosted-glass UI cards with backdrop blur, transparency and borders, then copy the CSS.

Preview

Glass Card

Frosted glass floating over a vivid backdrop.

Backdrop
CSS output

Outputs both backdrop-filter and -webkit-backdrop-filter. Note: backdrop-filter is unsupported in older browsers (e.g. Firefox below 103); add a solid fallback background for those.

px
%
px
Glass fill
20%
Border
30%
Quality presets

About Glassmorphism Generator

The Glassmorphism Generator builds the frosted-glass card effect: a translucent panel that blurs whatever sits behind it. Sliders control the backdrop-filter blur and saturation, the glass tint color and its transparency, the border color and opacity, the corner radius and an outer shadow — every change is rendered live over a vivid backdrop so you can judge the effect realistically.

Four quality presets — subtle, frosted, vivid and dark glass — give you proven combinations to start from. The dark preset shows how the same recipe adapts to dark UIs, where a faint light border does most of the work of separating the glass from the background.

The generated CSS includes both backdrop-filter and the -webkit-backdrop-filter prefix that Safari requires. Note the compatibility caveat: older browsers (for example Firefox before version 103) don’t support backdrop-filter, so ship a solid fallback background for them.

How to use Glassmorphism Generator

  1. Start from a preset — subtle, frosted, vivid or dark glass — or from the defaults.
  2. Adjust the blur and saturation of the backdrop filter.
  3. Set the glass tint color and its transparency.
  4. Tune the border color, border opacity, corner radius and outline shadow.
  5. Copy the CSS — it already includes the -webkit- prefixed property for Safari.

Frequently asked questions

The panel gets a semi-transparent background color, and backdrop-filter: blur() blurs whatever renders behind it. A saturation boost keeps the blurred colors lively, and a subtle semi-opaque border sells the glass edge.

backdrop-filter needs a translucent background on the element and browser support — Firefox only enabled it in version 103. Safari needs the -webkit-backdrop-filter prefix, which the generated CSS already includes. Always define a solid fallback background.

Contrast management. Increase the blur or lower the transparency until text passes contrast guidelines against the busiest possible backdrop, and add the border so the card’s edge stays visible over both light and dark regions.

It is one of the costlier CSS effects, since the browser re-blurs the backdrop as content moves. Use it on a few key surfaces rather than dozens of stacked cards, and test scrolling on mid-range mobile devices.

Yes, entirely free and browser-based — tweak the sliders and copy the CSS with no account and no upload.


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