Glassmorphism Generator
Generate CSS for frosted-glass card effects with configurable blur, opacity, and border. Preview live and copy ready-to-use CSS code.
Glass Settings
Preview & CSS Code
.glass-card {
background: rgba(255, 255, 255, 0.18);
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
border: 1px solid rgba(255, 255, 255, 0.3);
border-radius: 16px;
}blur(12px)Related Tools
About This Tool
How It Works
- Adjust blur intensity to control the frosted-glass effect depth
- Set transparency level with the opacity slider
- Pick border color and opacity for the glass edge highlight
- Enable or disable a subtle background gradient for depth
- Choose between dark and light glass styles
- Copy the generated CSS and paste it directly into your project
Common Use Cases
- Designing modern UI cards with frosted-glass aesthetics
- Creating hero section overlays on photo backgrounds
- Building modal dialogs and popups with depth
- Styling navigation bars and sidebars with a glass effect
- Crafting landing page elements with a premium look
- Adding visual depth to dashboards and analytics UIs
Frequently Asked Questions
What is glassmorphism?
Glassmorphism is a modern UI design trend that creates a frosted-glass appearance by combining a semi-transparent background, a backdrop blur filter, a subtle border, and sometimes a soft shadow. It gives elements a layered, depth-rich look popular in landing pages, dashboards, and cards.
How does the backdrop-filter CSS property work?
The CSS backdrop-filter property applies graphical effects such as blurring to the area behind an element. When combined with a semi-transparent background, it produces the frosted-glass look. The -webkit-backdrop-filter prefix is required for full Safari support.
Which browsers support backdrop-filter?
backdrop-filter is supported in all modern browsers: Chrome, Edge, Firefox (v103+), Safari, and Opera. The -webkit- prefix covers older Safari versions. Internet Explorer does not support this property. The generated CSS includes both the standard and prefixed versions for maximum compatibility.
What blur value should I use for the best glassmorphism effect?
A blur value between 8px and 20px typically produces the best frosted-glass look. Values below 4px appear too sharp, while values above 30px can look overly blurred. The ideal value depends on your background complexity — highly detailed backgrounds benefit from higher blur values.
Why does the glass effect not show on a solid white background?
Glassmorphism requires a colorful or complex background to be visible. If the background behind the card is plain white or a single solid color, the blur and transparency have no visible content to blend. Use the background gradient or image options to add a colorful backdrop to the preview.
How do I use the generated CSS in my project?
Copy the CSS code using the Copy CSS button and paste it into your stylesheet. Apply the .glass-card class to your HTML element. Ensure the parent container has a colorful background or positioned background image behind the glass card for the effect to appear correctly.
What is the difference between glass opacity and border opacity?
Glass opacity controls how transparent the card background itself is — lower values let more of the background show through. Border opacity independently controls the visibility of the card's border highlight, which is usually a semi-transparent white line that gives the glass edge a realistic sheen.
Can I add a gradient to the glass card instead of a solid color?
Yes! Enable the Background Gradient toggle in the glass settings. You can then choose two colors and an angle to create a linear gradient background for the glass card. The opacity slider is applied to both gradient stops, maintaining the frosted-glass transparency.
What preset styles are available?
The tool includes six presets: Light Glass (classic white frosted), Dark Glass (dark semi-transparent panel), Frosted (heavy blur, high opacity), Colorful (purple-pink gradient glass), Minimal (barely visible glass layer), and Vibrant (cyan-teal glass over a bold background).
How do I preview the glass effect on my own background image?
Switch the Background Scene toggle to Image URL and paste a direct link to an image. The preview will display your image as the background behind the glass card. Publicly accessible image URLs work best.
Does glassmorphism affect performance?
backdrop-filter can be GPU-intensive, especially with high blur values or many glass elements on the same page. For performance, keep blur values reasonable (under 20px), avoid stacking many glass layers, and test on lower-powered devices.
Can I use glassmorphism for buttons and navigation bars?
Absolutely. Glassmorphism works well on buttons, nav bars, sidebars, modals, tooltips, and any floating UI element. Keep the border radius appropriate for the element type and ensure sufficient color contrast between text and the glass background for readability.