Generate frosted glass CSS effects online free with a live preview. Adjust blur, transparency, border, and background to create stunning glassmorphism UI cards and panels.
Glassmorphism requires specific combinations of backdrop-filter, background-color with alpha, and border properties to look right. Getting the blur and transparency balance right without a visual preview requires tedious trial-and-error.
Generate the CSS for glass-morphism effects - the frosted glass card style used in modern UI design - with live preview, adjustable blur, transparency, and border values, and copy the complete CSS block.
Create frosted glass card components for dashboards and landing pages, design glassmorphic modals and dialog boxes, build navigation bars with glass background, create glass-effect notification toasts, design onboarding overlay screens, and style profile cards for portfolios.
The most common question is about browser support. The backdrop-filter property that creates the blur effect requires -webkit-backdrop-filter for Safari. Chrome, Edge, and Firefox support it without prefix. The generator includes both for maximum compatibility.
Set backdrop blur, background opacity, border, and shadow.
See the glassmorphism effect render on a card in real time.
Change the background gradient color beneath the glass.
Copy the complete CSS snippet for your project.
Common questions about this tool and how to use it.
Glassmorphism is a design trend where UI elements (cards, panels, modals) appear as frosted glass - semi-transparent with a blurred background visible through the element, a subtle border, and soft shadows. Popularized in Apple's macOS Big Sur (2020) and widely adopted in web design. It creates depth and hierarchy by layering elements with varying levels of transparency against colorful or image backgrounds.
Three properties are essential: background: rgba(255,255,255,0.15) - semi-transparent white background. backdrop-filter: blur(12px) - blurs everything behind the element. border: 1px solid rgba(255,255,255,0.3) - subtle white border for the glass edge. Usually combined with box-shadow for depth. The -webkit-backdrop-filter property is needed for Safari compatibility.
backdrop-filter is supported in Chrome 76+, Edge 17+, Safari 9+, and Firefox 103+ (though Firefox required enabling a flag until 103). Safari requires -webkit-backdrop-filter as a fallback. Mobile browsers: iOS Safari 9+ and Chrome for Android both support it. For production use, include both prefixed and unprefixed versions: -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
backdrop-filter only works when there is content behind the element. A white page background produces a white blur - the effect is invisible. backdrop-filter requires a colorful or image background behind the element to look like glass. Also verify: the element must have a semi-transparent background (rgba with alpha < 1, not a solid color). If using backdrop-filter on a child element, the parent must not have overflow: hidden.
Yes - semi-transparent backgrounds reduce the contrast between text and its background, potentially failing WCAG contrast ratio requirements (4.5:1 for normal text). The blurred background content behind glass elements can create visual confusion for users with cognitive disabilities. Best practice: ensure text on glass elements meets contrast requirements against the darkest background color that could show through, and don't rely solely on the glass effect to convey information.
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