CSS Glassmorphism Generator — Frosted Glass Effect, Copy Code Free

This free CSS glassmorphism generator lets you design frosted-glass UI elements with a real-time preview. Dial in every parameter — blur, opacity, backdrop saturation, shadow depth, border opacity, and border radius — then copy the production-ready code in CSS class, inline style, or Tailwind format. No sign-up, no server, everything runs in your browser.

Glassmorphism (also written "glass morphism") is one of the most searched UI trends of the last few years. It powers the frosted-glass cards and modals you see in macOS, iOS, Windows 11, and modern web dashboards. The effect relies on backdrop-filter: blur() combined with a semi-transparent rgba() background — our tool generates exactly that CSS for you, cross-browser-ready.

Blur, opacity, saturation, shadow depth, shadow opacity, noise texture, border width, border opacity, and border radius — all update the preview in real time.

No uploads, no server calls, no account needed. Your design stays private on your device.

CSS class, HTML inline style attribute, or Tailwind CSS arbitrary properties — one click to copy whichever fits your stack.

Start from a curated preset, then test against 6 animated preview backgrounds to see how your glass performs over different colors.

Glassmorphism is a UI design style that mimics frosted or translucent glass. It's characterised by a semi-transparent background (using rgba()), a backdrop blur (using backdrop-filter: blur()), a subtle border for the inner-glow rim, and a box-shadow for depth. The result is a layered, floating-panel look that works especially well over colorful gradient or photo backgrounds.

The term was popularised by Michal Malewicz and spread rapidly through the design community in 2020—2021. In 2026 it remains a staple for dashboards, modal dialogs, hero cards, and mobile app UIs. Search queries like "glassmorphism CSS", "frosted glass CSS generator", "backdrop-filter blur CSS", and "glass effect CSS card" consistently rank in the top developer searches.

The core CSS our tool outputs looks like this (values vary based on your sliders):

.glass {
  background: rgba(255, 255, 255, 0.15);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
  box-shadow: 0 12px 24px 0 rgba(31, 38, 135, 0.30);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 20px;
}

The saturate() function on the backdrop-filter is what many generators call "refraction" — it intensifies the colors showing through the glass, making the effect more vivid and realistic.

Glassmorphism effects are most impactful when combined with a polished overall design system. Once you've generated your glass effect CSS, use our CSS minifier to strip whitespace and compress the output for production. Our SVG path visualizer helps you build and debug the icon shapes or decorative elements that sit inside your glass panels. For the JavaScript that powers any interactive glassmorphism UI components, our JS minifier reduces bundle size. When embedding background images or SVGs as data URIs in your CSS, our Base64 encoder converts them to inline strings.

Our diff checker is useful for comparing CSS output between two glassmorphism configurations to see exactly what properties changed. The URL encoder handles percent-encoding SVG background images referenced in CSS url() properties. For validating any JSON configuration your design system uses to store theme values, our JSON formatter ensures the data is clean. When writing documentation for your design system, our Markdown preview renders your README files, and our HTML to Markdown converter turns existing HTML docs into Markdown for version-controlled repos.