CSS Glassmorphism Generator
Create stunning frosted glass effects with CSS backdrop-filter. Design modern glassmorphic UI elements with live preview and instant CSS output.
Browser Support: backdrop-filter requires modern browsers (Chrome 76+, Safari 9+, Firefox 103+). Not supported in IE. Always provide fallback styling for older browsers.
Glass Presets
Backdrop Filter
Background
Border
Box Shadow
Background Image
Live Preview
Glass Card
This demonstrates the glassmorphism effect with backdrop blur and transparency.
Generated CSS
.glass-element {
background: rgba(255, 255, 255, 0.15);
-webkit-backdrop-filter: blur(10px);
backdrop-filter: blur(10px);
border: 1px solid rgba(255, 255, 255, 0.2);
border-radius: 12px;
box-shadow: 0px 8px 32px 0px rgba(31, 38, 135, 0.37);
}Recommended Settings
Browser Compatibility
- •Always include -webkit-backdrop-filter prefix for Safari
- •Provide fallback with semi-transparent background for IE/older browsers
- •Use @supports(backdrop-filter: blur()) for progressive enhancement
- •Test on Firefox 103+ and Safari 9+ for full support
Performance Tips
- •Keep blur values between 8-16px for optimal performance
- •Avoid using backdrop-filter on large elements (>50% viewport)
- •Never animate backdrop-filter (animate opacity instead)
- •Use will-change: backdrop-filter sparingly for animations
- •Test on mobile devices - can drain battery significantly
Pro Tips
- •White glass on light backgrounds, dark glass on dark backgrounds
- •Subtle borders (1px rgba white/black 20-30% opacity) define edges
- •Box shadows add depth - use Y offset > X offset for natural lighting
- •Higher blur = stronger glass effect, but worse performance
Most Popular
backdrop-filter: blur(10px); background: rgba(255,255,255,0.15);
When to Use This Tool
Create modern dashboard cards over background images or gradients. Glass effect adds visual interest while maintaining readability of content.
Recommended: Frosted Glass or Card Glass preset
Semi-transparent navigation that blurs content behind it. Perfect for modern web apps with scrolling content beneath fixed headers.
Recommended: Navbar Glass preset (high opacity)
Glassmorphic modals create depth and focus while keeping context visible. Subtle transparency maintains spatial awareness.
Recommended: Dark Glass for overlays
Glass cards over hero images for call-to-actions or key messages. Creates depth without blocking beautiful background imagery.
Recommended: Sharp Glass or Borderless preset
Differentiate pricing tiers with varying glass intensities. More premium tiers can have stronger glass effects for visual hierarchy.
Recommended: Card Glass or Vibrant Glass
How It Works
Choose a glass preset or start from scratch
Adjust backdrop-filter blur for frosted glass strength
Set background transparency for desired opacity
Add subtle border for edge definition
Configure box shadow for depth and elevation
Upload background image to preview effect
Copy CSS code to use in your project
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Frequently Asked Questions
What is glassmorphism?
Glassmorphism is a design trend that mimics frosted glass using CSS backdrop-filter. It creates a translucent, blurred effect on elements, making them appear like frosted glass over the content behind them. The effect combines backdrop-filter blur with semi-transparent backgrounds and subtle borders.
What's the browser support for backdrop-filter?
backdrop-filter works in Chrome 76+, Safari 9+ (with -webkit- prefix), and Firefox 103+. It's NOT supported in Internet Explorer. Always provide a fallback with a semi-transparent background for unsupported browsers. Use @supports(backdrop-filter: blur()) to detect support.
Does backdrop-filter impact performance?
Yes, backdrop-filter can be expensive, especially with high blur values (>20px) or on large elements. It forces the browser to continuously blur content behind the element. Avoid animating it, limit usage to small UI elements, and test on mobile devices where performance impact is greater.
When should I use glassmorphism?
Use glassmorphism for modern UI elements like navigation bars, cards, modals, and overlays - especially when you want to maintain visual context of content behind. Avoid overuse; limit to 5-10% of viewport. Works best over images, gradients, or colorful backgrounds where the blur effect is visible.
How do I make glassmorphism responsive?
Use relative units (%, rem) for sizing and spacing. Reduce or remove backdrop-filter on mobile using media queries to improve performance: @media (max-width: 768px) { .glass { backdrop-filter: none; background: rgba(255,255,255,0.8); }}. Stronger backgrounds work better on small screens.
What if backdrop-filter isn't supported?
Always provide a fallback background with higher opacity. For example: background: rgba(255,255,255,0.8) as fallback, then background: rgba(255,255,255,0.15) inside @supports(backdrop-filter: blur()). This ensures the element is visible even without the glass effect.