Glassmorphism Generator
Create frosted glass CSS effects using backdrop-filter — configure blur, transparency, and border for modern glass cards.
Last updated: March 25, 2026
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Buy me a coffeeWhat is Glassmorphism Generator?
Glassmorphism is a 2021 UI design trend popularized by Apple macOS Big Sur and iOS. It creates the visual impression of a frosted glass panel — where background content is visible but blurred through a semi-transparent surface. The effect conveys layering, depth, and modernity while maintaining a clean, minimal aesthetic. Microsoft's Fluent Design (Acrylic Material) and Apple's Vibrancy use the same underlying technique.
The CSS implementation uses three properties working together: backdrop-filter: blur(Xpx) to blur the background behind the element, background: rgba(255,255,255, 0.2) to make the element semi-transparent (the glass color), and border: 1px solid rgba(255,255,255, 0.3) to add a subtle light-catching edge (the "glass rim" that enhances realism). The frosted blur only produces the glass illusion when there is a colorful or textural background behind the element — on a white background, the effect is invisible because there is nothing to blur.
How to Use Glassmorphism Generator
Adjust the Blur slider (10–40px is the sweet spot — too little looks transparent, too much looks frosted solid)
Set the Transparency slider — 10–30% opacity makes a realistic frosted glass, higher values look more tinted
Choose the glass tint color (white for standard glass, light blue for cool-toned, light amber for warm-toned)
Toggle the glass border on/off and adjust border opacity (a subtle white border adds realism)
Click "Copy CSS" to get the full declaration block — requires a colorful background in your project for the effect to be visible
Common Use Cases
- Creating a floating glass navigation bar with depth over a gradient hero section
- Designing a login/signup modal that blurs the background content behind it
- Building dashboard stat cards with frosted glass appearance over a background image
- Creating a glass tooltip or popover that lets background content show through
- Designing a mobile notification UI with glass panels layered over a wallpaper background
- Creating a glassmorphic pricing card for a SaaS landing page over a gradient background
- Building a sidebar drawer that frosts over the main content when open
- Designing a photo viewer overlay where the glass panel lets the photo color influence the card tint
Example Input and Output
Complete CSS for a glassmorphic card component:
Blur: 16px
Transparency: 20% (rgba alpha: 0.2)
Glass color: White tint
Border: Yes (15% opacity)
Border radius: 16px.glass-card {
/* Semi-transparent glass surface */
background: rgba(255, 255, 255, 0.2);
/* Frosted blur effect — blurs whatever is behind the element */
backdrop-filter: blur(16px);
-webkit-backdrop-filter: blur(16px); /* Safari prefix required */
/* Glass rim highlight */
border: 1px solid rgba(255, 255, 255, 0.3);
border-radius: 16px;
/* Optional: subtle shadow for depth */
box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}
/* Required: colorful background on the page/parent */
.page-background {
background: linear-gradient(135deg, #6366f1, #8b5cf6, #ec4899);
}Client-Side Processing
All CSS generation and the live preview demo happen locally in your browser. No data is sent to our servers.
prefers-reduced-transparency
Some users enable a system accessibility setting to reduce transparency effects (common in macOS Accessibility settings). Respect this preference: @media (prefers-reduced-transparency: reduce) { .glass-card { backdrop-filter: none; background: rgba(255,255,255,0.85); } }. This provides a solid alternative without losing the structural design of your component.
Combining Glass + Neumorphism
A contemporary hybrid design pairs glassmorphism for layered panels with neumorphic inner elements — e.g., a glass dashboard card containing soft-UI buttons. Use glassmorphism for the container layer (depth via blur) and neumorphism for individual controls within it (depth via shadow). This creates a rich spatial hierarchy without either effect feeling overdone.
Frequently Asked Questions
Why doesn't my glassmorphism effect work?
Which browsers support backdrop-filter?
How do I add a -webkit- prefix?
Will glassmorphism affect my page performance?
Can I use glassmorphism over a video background?
How do I make text readable over a glass card?
How This Tool Works
The live preview renders a colorful gradient background div with the generated glass card div positioned over it. Slider values update CSS custom properties on the glass card element via JavaScript. The blur slider sets backdrop-filter: blur(Npx), transparency sets the rgba alpha channel, tint color sets the rgb values, and border opacity sets the border rgba alpha. The final CSS string is assembled from the current slider values and formatted for display and copy.
Technical Stack