Four backdrop patterns
Preview the blur against sunset, ocean, mesh-dot and aurora backgrounds so the effect is always visible.
CSS Backdrop Filter Generator
Build a frosted glass card visually. Tune the blur, tint and border against a colorful backdrop, then copy the finished CSS.
Glassmorphism
This frosted card blurs the colorful backdrop behind it while staying readable on top.
Ready-to-use CSS
Frosted glass, tuned visually
Get the glassmorphism look right without trial-and-error edits to your stylesheet.
Full tint control
Set the glass fill and border colors with independent alpha sliders for exactly the right translucency.
Cross-browser CSS
Copy CSS that includes the -webkit-backdrop-filter prefix for older Safari support.
How to use the backdrop filter generator
- Pick a backdropChoose a background pattern so the blur effect has something colorful to work against.
- Tune the blurAdjust blur, brightness, saturate and contrast until the frosted look feels right.
- Style the glassSet the fill, border and radius, then copy the CSS for both layers.
About CSS backdrop-filter
The CSS backdrop-filter property applies filter effects — most commonly blur() — to the area behind an element, rather than to the element's own content the way filter does. That distinction is what makes the popular glassmorphism look possible: a semi-transparent panel sits on top of a photo or gradient, and the backdrop-filter blurs and desaturates whatever shows through it, while any text or icons on the panel itself stay perfectly sharp. For the effect to be visible at all, two things need to be true: the element needs a backdrop-filter value, and its own background needs enough transparency (typically an rgba() or hsla() fill) that the blurred layer beneath can actually show through — a fully opaque background will hide the effect completely. Browser support is strong across current Chrome, Edge, Firefox and Safari, though Safari historically required the -webkit-backdrop-filter prefix, which is why production CSS should always ship both properties together. Performance-wise, backdrop-filter is more expensive to composite than a plain background, since the browser has to continually re-render the blurred region as content moves or scrolls behind it, so it's best reserved for a handful of prominent surfaces like navigation bars, modals and cards rather than applied broadly across a layout.
Always ship the prefix
Pair backdrop-filter with -webkit-backdrop-filter so the effect degrades gracefully instead of failing silently in older Safari.
Keep the fill translucent
An rgba() or hsla() background is required — a solid color hides the blurred backdrop entirely.
Watch contrast
Test text readability against every backdrop the card might sit on, not just your demo background.
Use it sparingly
Backdrop-filter is compositor-heavy; reserve it for a few key surfaces rather than the whole page.
CSS backdrop filter generator FAQ
What is CSS backdrop-filter?
backdrop-filter applies graphical effects, most commonly blur, to whatever is rendered behind an element, rather than to the element's own content, which is what creates the frosted glass look.
Why isn't my backdrop-filter blur showing up?
backdrop-filter needs something visible behind the element to blur, and the element itself usually needs a semi-transparent background so the blurred backdrop can show through it.
Is backdrop-filter supported in all browsers?
Support is good in current Chrome, Edge, Firefox and Safari, though older Safari versions need the -webkit-backdrop-filter prefix, which this generator includes automatically.
What's the difference between filter and backdrop-filter?
filter affects the element and its own content directly, while backdrop-filter only affects the area behind the element, leaving the element's own content unaffected by the blur.
Is this glassmorphism generator free to use?
Yes. It's completely free, needs no signup, and generates the CSS locally in your browser.
Try other CSS design tools
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