Glassmorphism Generator
Generate CSS glassmorphism effects with blur and transparency controls. Live preview and ready-to-copy CSS for frosted glass UI designs.
Glassmorphism Generator
Design beautiful frosty glass CSS effects.
All processing happens locally in your browser — nothing is stored or sent to any server.
How to Use the Glassmorphism Generator
- Adjust the blur slider to control background blur intensity.
- Set the transparency level for the glass panel overlay.
- See the live preview update in real time.
- Copy the generated CSS and paste it into your project.
About Glassmorphism
Glassmorphism is a UI design trend that mimics the appearance of frosted glass: blurred backgrounds, semi-transparent surfaces, and subtle borders. It gained mainstream adoption with Apple's macOS Big Sur (2020) and has since become a staple of modern web design, used heavily in dashboards, cards, modals, and navigation bars.
The CSS behind the effect uses three key properties: backdrop-filter: blur(Xpx) to blur what is behind the element, background: rgba(255,255,255,0.1) for the semi-transparent surface, and a subtle border with low opacity for the glass edge. Together these create the illusion of a frosted panel floating above the background.
This generator outputs all necessary CSS including the -webkit-backdrop-filter vendor prefix for Safari compatibility. The generated code is production-ready — paste it directly into your stylesheet. All processing runs locally in your browser, so your design data is never sent anywhere.
Frequently Asked Questions
What browsers support glassmorphism? ▼
The backdrop-filter CSS property is supported in Chrome 76+, Edge 17+, Safari 9+, and Firefox 103+. As of 2024, global browser support is above 95%. For older Firefox versions, the -webkit-backdrop-filter vendor prefix was required.
Does glassmorphism work on dark backgrounds? ▼
Yes, and it actually looks best on vibrant, colorful, or gradient backgrounds. On a plain white or dark background, the blur has less visual impact. Try it on images or gradients to see the full frosted-glass effect.
Can I customize the border? ▼
The generated CSS includes a semi-transparent border (1px solid rgba(255,255,255,0.2) by default). You can change the color, opacity, and width to match your design. A subtle white border is key to the glassmorphism look.
Why does my glassmorphism effect not show a blur? ▼
backdrop-filter only blurs elements that appear behind the element in the stacking context. Make sure the element has a parent with content or a background visible behind it. Also check that you do not have overflow: hidden on a parent element, which can clip the blur.
What is the difference between filter: blur() and backdrop-filter: blur()? ▼
filter: blur() blurs the element itself and everything inside it. backdrop-filter: blur() blurs only the content behind the element, creating the frosted-glass effect. Glassmorphism uses backdrop-filter.
How much blur looks good? ▼
Generally 10px–20px creates a pleasing effect. Below 5px the blur is barely visible; above 30px it can look muddy or hurt performance on mobile. The sweet spot depends on your background content — more complex backgrounds benefit from stronger blur.
Does heavy blur affect performance? ▼
Yes. backdrop-filter is GPU-accelerated but computationally expensive, especially on low-end mobile devices or when applied to large elements. Use it sparingly — on small cards or modals rather than full-page overlays — for best performance.