Glassmorphism Generator
Design frosted-glass CSS surfaces with a live preview.
What is Glassmorphism?
Glassmorphism is a UI design trend that creates the illusion of frosted or translucent glass by combining a semi-transparent background with a blur effect, subtle border, and shadow. The result is a layered, depth-creating visual style that became popular in the early 2020s, notably in macOS Big Sur, iOS 15, and Windows 11.
The CSS implementation relies on two key properties: backdrop-filter: blur() blurs everything behind the element, and background-color with a low alpha value provides the tinted, translucent surface. A subtle 1px border with low opacity completes the glass illusion by mimicking the light reflection at a real glass edge.
Browser support for backdrop-filter is now excellent: Chrome 76+, Edge 17+, Safari 9+, Firefox 103+. Always include the -webkit-backdrop-filter vendor prefix for Safari compatibility. Provide a solid-color fallback for environments where backdrop-filter is not supported (some low-power devices disable it for performance).
Common mistakes
- Performance — backdrop-filter is GPU-accelerated but expensive at large scale. Avoid using it on full-page overlays or many simultaneous elements on mobile devices.
- No background behind the card — Glassmorphism only looks good when there is a colourful or patterned background visible behind the glass element. On a white page, there is nothing to blur.
- Readability — Ensure text on glass cards has sufficient contrast. The blurred background may make text hard to read. Add a slightly more opaque background or use white text on coloured glass.