CSS Glassmorphism Generator
Create frosted glass effects with live preview and copy-ready CSS. Adjust blur, opacity, and border. Free online tool, no signup.
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Frequently asked questions
- What is glassmorphism?
- A design trend popularized by macOS Big Sur and iOS that uses translucent backgrounds + heavy blur to create a frosted-glass effect. Best used over colorful or photographic backgrounds.
- Why does the effect look invisible?
- backdrop-filter only works when there is something colorful behind the element. On a flat black background you will see almost nothing - try it over a gradient or image.
- Browser support for backdrop-filter?
- Chrome, Edge, Safari (with -webkit- prefix), Firefox 103+. The tool emits both prefixed and unprefixed versions for safety.
- Performance impact?
- backdrop-filter is GPU-accelerated but expensive. Avoid stacking many glass elements or using huge blur values on long pages - it can cause scroll jank on low-end devices.
- What is in the generated CSS?
- An rgba background built from the picked colour and the transparency slider, backdrop-filter with blur and saturate plus the -webkit- duplicate, a 16px radius, and an optional 1px border slightly more opaque than the fill.
- What do the sliders cover?
- Blur 0 to 60 px, transparency 0 to 1, and saturation 100% to 300%. Saturation above 100% is what gives the frosted panel its slight colour lift.