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CSS Glassmorphism Generator
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This CSS Glassmorphism Generator builds the frosted-glass UI effect popularized by modern design systems — a semi-transparent background, a backdrop blur applied to whatever sits behind the element, and a subtle light border — from simple controls for blur amount, background color and opacity, border opacity, and corner radius. Adjust any control and get complete, ready-to-paste CSS instantly, including the -webkit- prefix for Safari compatibility. It's a quick way to dial in a glass-panel card, navbar, or modal without hand-tuning rgba() values and backdrop-filter syntax. Everything runs locally in your browser. Scroll down to adjust the controls.
Features
- Full control over blur, background opacity, border opacity, and radius
- Includes the -webkit-backdrop-filter prefix for Safari
- Instant CSS output as you adjust values
- One-click copy of the generated CSS
Why use this css glassmorphism generator?
- Faster than hand-tuning rgba() and backdrop-filter values
- Produces valid, cross-browser-aware CSS
- Fully private — nothing uploaded
- Free with unlimited use
Frequently asked questions
What does backdrop-filter do?
It applies a graphical effect (here, a blur) to whatever content is visible behind an element, rather than to the element itself — this is what creates the "frosted glass" look where background content is visible but softened.
Why is there a separate -webkit- version?
Safari historically required the -webkit- prefixed version of backdrop-filter for the effect to render; including both ensures the effect works consistently across modern browsers.
Does glassmorphism work on any background?
It needs visible content behind the element to blur — a glass effect over a plain solid background will look subtle since there's little detail to blur into a soft haze.
What background opacity should I use?
0.1-0.3 is a common range for a subtle glass look; higher values make the panel more opaque and less "glassy," while very low values can hurt text readability on top of it.
Does this affect performance?
backdrop-filter can be more GPU-intensive than a plain background, especially with large blur radii over large areas — test on lower-powered devices if using it extensively.