Free Glassmorphism CSS Generator - Create Frosted Glass Effects Online

Glassmorphism is a dominant trend in modern UI design, characterized by translucency, vivid background blurring (frosted glass), and subtle borders. Our free generator allows you to create production-ready CSS code for glassmorphic elements, with realtime preview and adjustable parameters for blur, transparency, and color.

What is Glassmorphism?

Glassmorphism (or "frosted glass") is a design style that mimics the look of translucent glass. It creates a sense of depth and hierarchy by blurring the background behind an element while maintaining legibility of the content on top. This effect is widely used by Apple (macOS Big Sur, iOS), Microsoft (Fluent Design), and modern web applications.

Key Characteristics:

• Translucency: Backgrounds are semi-transparent, allowing underlying elements to show through subtly.
• Background Blur: The defining feature - heavy blurring of the backdrop using CSS backdrop-filter.
• Vivid Colors: Works best on colorful, gradient backgrounds that emphasize the blur effect.
• Light Borders: Subtle, semi-transparent white borders (1px) mimic the edge of a glass pane.

How to Generate Glassmorphism CSS

1. Adjust Blur: Control the intensity of the frosted effect (0px to 40px). Higher blur creates a more "frosted" look, while lower blur is more transparent.
2. Set Transparency: Define the opacity of the glass layer (0.0 to 1.0). A value between 0.1 and 0.3 usually yields the best glass effect.
3. Choose Color: Select the base tint (white or black) to create light or smoked glass effects.
4. Copy Code: Instantly get the CSS code, including the crucial backdrop-filter property and fallbacks.

The CSS Behind the Effect: backdrop-filter

The magic of glassmorphism relies on a single CSS property: backdrop-filter: blur(10px);. Unlike standard filter: blur() which blurs the element itself, backdrop-filter applies the effect to everything behind the element.

Code Example

.glass-card {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

Design Best Practices

1. Use Colorful Backgrounds

Glassmorphism fails on flat, solid-color backgrounds because the blur has nothing to "smear." Use vibrant gradients, abstract shapes, or high-quality photos as your page background to make the glass effect pop.

2. Layering and Depth

Create visual hierarchy by stacking glass elements. A modal on top of a card on top of a background creates a deep, 3D interface. Ensure adequate spacing and shadow usage to differentiate layers.

3. Accessibility Considerations

Translucent backgrounds can readability issues. Always ensure sufficient contrast for text content. Use darker options for text (rgba(0,0,0,0.8)) or consider a solid background fallback for browsers that don't support backdrop-filter.

4. Border Handling

The 1px semi-transparent border is crucial. It defines the edges of your glass pane, especially when the background color is similar to the glass tint. Use border: 1px solid rgba(255, 255, 255, 0.3); for best results.

Browser Support & Performance

The backdrop-filter property is supported by all modern browsers (Chrome, Edge, Safari, Opera). Firefox supports it by default in recent versions (since v103). For older browsers, the background will simply appear semi-transparent without the blur, which is a graceful degradation.

Performance Note: Heavy use of backdrop-filter can be GPU-intensive, especially on large areas or mobile devices. Use it judiciously for cards, headers, and modals rather than full-page overlays.

Common Use Cases

Dashboards

Glassmorphism works excellently for dashboard widgets, separating data panels from the background map or visualization while keeping the interface feeling lightweight and airy.

Mobile UI

iOS control center and notification panels famously use this effect. It provides context (you can see where you are) while focusing attention on the controls.

Login Screens

A centered glass login form over a beautiful branded background image creates a stunning, modern entry point for your application.

Frequently Asked Questions

?? Read Our Complete Glassmorphism Design Guide ?