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// GENERATED CSS
// generate frosted glass css effects in one click
Generate frosted glass CSS effects instantly. Customize blur, opacity, border, and background. Copy ready-to-use CSS for your UI cards and modals.
Choose one of the preset gradients or configure the glass color to match your design.
Tune blur, opacity, saturation, border, and border-radius to get the exact frosted glass look you want.
Click "Copy CSS" and paste the generated code directly into your stylesheet.
The Glassmorphism Generator lets you create frosted glass CSS effects without any manual coding. Adjust blur, opacity, border, saturation, and border-radius using sliders — the live card preview updates instantly. When you're happy, copy the generated CSS and drop it straight into your project.
Glassmorphism is a UI design trend that mimics frosted glass — elements appear semi-transparent with a blur effect showing what's behind them. It's achieved with CSS backdrop-filter: blur() and a low-opacity background.
All modern browsers support backdrop-filter: Chrome 76+, Firefox 103+, Safari 9+ (with -webkit- prefix), and Edge 79+. For older Firefox versions you may need to enable a flag. Always check caniuse.com for the latest data.
The output includes a @supports block suggestion. For browsers that don't support backdrop-filter, provide a solid semi-transparent background as a fallback so content remains readable.
The saturate() function inside backdrop-filter boosts the colors visible through the glass, making the frosted effect more vivid and vibrant. Lower values produce a more neutral, grey-tinted glass look.
Glassmorphism only works visually when there's content or color behind the element. On a plain white or dark background the blur has nothing to work with. Always place glass cards over images, gradients, or other elements.
Heavy backdrop-filter blur values can be GPU-intensive on mobile. Keep blur under 20px for better performance and test on real devices. You can also disable the effect on lower-end devices using a media query.
A Glassmorphism Generator is a browser-based tool that lets you visually configure and export CSS for frosted glass UI effects. Instead of manually writing and tweaking backdrop-filter, background, border, and box-shadow values by trial and error, you use sliders and a live preview to get exactly the look you want — then copy the finished CSS in one click.
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The glassmorphism effect relies on three key CSS properties working together:
Combined with border-radius for soft corners and box-shadow for depth, these properties produce the complete frosted glass card effect that has defined modern UI design since around 2020.
Glassmorphism emerged as a major UI design trend following Apple's introduction of frosted glass elements in macOS Big Sur and iOS 13. The aesthetic — transparent layered surfaces with visible blur — quickly spread across web and app design. It creates a sense of depth and layering while keeping interfaces light and airy.
The term "glassmorphism" was popularized by designer Michal Malewicz in 2020 and rapidly became one of the defining looks of modern UI alongside neumorphism and flat design. Unlike neumorphism, glassmorphism works exceptionally well on dark and gradient-heavy backgrounds, making it ideal for landing pages, dashboards, and app UIs.
While these trends share the "minimal and modern" umbrella, they differ significantly in approach. Flat design removes all decoration and depth cues — icons are simple, colors are solid, and shadows are absent. Neumorphism uses subtle inner and outer shadows on a monochromatic base to simulate soft physical extrusion, but suffers from poor accessibility contrast. Glassmorphism takes the opposite route — it embraces transparency, blur, and vivid backgrounds, resulting in high visual impact with relatively good accessibility when contrast is managed.
Glassmorphism works best in specific contexts. Hero sections and landing pages with gradient or image backgrounds benefit most — the blur makes cards "float" over the scene. Login modals, dashboard widgets, notification toasts, and navigation drawers are all strong candidates. Avoid using glassmorphism as the primary pattern for long-form content or data-dense interfaces where readability is paramount, since a blurred background can reduce text legibility if not configured carefully.
The biggest accessibility pitfall of glassmorphism is insufficient text contrast. Because the background behind a glass card is blurred and variable in color, text that passes contrast checks on a neutral background may fail against certain background colors. Always test your glass card text against the darkest and lightest backgrounds it will appear over. Use WCAG AA minimum contrast ratios (4.5:1 for normal text, 3:1 for large text) and increase glass opacity or add a darker tint if needed.
The backdrop-filter property triggers a compositing layer in the browser, which means the GPU handles the blurring. High blur values on large elements can impact performance on mobile and lower-end devices. To optimize: keep blur values under 20px where possible, avoid applying glassmorphism to elements that animate frequently, and consider using will-change: backdrop-filter on elements that do animate. You can also disable the effect for users who prefer reduced motion using @media (prefers-reduced-motion: reduce).
As of 2024, backdrop-filter is supported across all major browsers. Safari has supported it since version 9 via the -webkit-backdrop-filter prefix. Chrome and Edge support it since version 76 without a prefix. Firefox added support in version 103. For the small percentage of users on older browsers, provide a fallback using a solid semi-transparent background so the card remains visible and readable even without the blur effect.
While frosted glass cards are the most common application, the technique extends to many UI patterns. Navigation bars with backdrop-filter create a trendy "sticky header" effect as page content scrolls beneath. Tooltip and popover designs benefit from the subtle depth glass provides. Image gallery lightboxes use glass overlays for controls. Mobile app splash screens and onboarding flows increasingly use the aesthetic for a modern, premium feel. The key is always ensuring there's rich content or color behind the element — glassmorphism on a plain background simply looks like a semi-transparent box without any of the visual magic.