Glassmorphism CSS Generator with Live Preview
This glassmorphism CSS generator builds the frosted glass effect for you visually — adjust the sliders and watch a glass panel update instantly, then copy production-ready CSS. The effect relies on backdrop-filter: blur() to blur whatever sits behind the element, paired with a semi-transparent background and a subtle border for the signature glass look.
You control every part of the effect: blur intensity, background color and opacity, saturation, border width and opacity, border radius, and shadow. It is built for cards and panels, frosted navigation bars, modals and overlays, and sidebars or widgets that float over colorful backgrounds.
How to Create a Frosted Glass Effect
Start from a preset
Click any of the 6 presets — Frosted White, Dark Glass, Neon Glow, Subtle Mist, Pastel Dream, or Warm Amber — to load a ready-made glass style as your base.
Fine-tune the controls
Adjust Blur, Saturation, Color, Opacity, Border width and opacity, Border Radius, and Shadow. Each control has a slider for quick changes and a number input for exact values.
Preview on any background
The glass panel updates in real time. Use the background switcher to test it over Gradient Blobs, your own uploaded Image, or a Solid Color.
Copy the CSS
Click Copy to put the generated CSS on your clipboard, then paste it straight into your project's stylesheet.
Features
Live Preview
Every change is reflected instantly on the glass panel over colorful gradient blobs, so you can judge the effect in real time.
Adjustable Blur
Set the backdrop-filter blur anywhere from 0 to 30px to control how heavy the frosted glass looks.
Color & Opacity
Tint the glass with any color and dial the background opacity from 0 to 100% to balance transparency and contrast.
Saturation Control
Boost color vibrancy through the glass from 100% to 200% to make the background behind it pop.
Border & Radius
Shape the glass edge with adjustable border width and opacity, plus a border radius from 0 to 50px for rounded corners.
Shadow Depth
Add a soft box-shadow with adjustable opacity to give the glass panel a sense of elevation.
6 Built-in Presets
Frosted White, Dark Glass, Neon Glow, Subtle Mist, Pastel Dream, and Warm Amber give you a curated head start.
Flexible Backgrounds
Preview against gradient blobs, a custom solid color, or your own uploaded image to see the glass over real content.
Production-Ready CSS
The generated code includes the -webkit-backdrop-filter prefix for Safari, so it works across modern browsers.
One-Click Copy
Copy the full CSS to your clipboard with a single button — no manual selecting or retyping.
Frequently Asked Questions
What is glassmorphism?
Glassmorphism is a UI design trend that creates a frosted glass effect with CSS. It combines backdrop-filter: blur() to blur the background behind an element, a semi-transparent background color, a subtle light border, and a soft shadow to make the element look like a pane of glass.
Why does the glass look invisible on a white background?
The effect uses backdrop-filter: blur(), which blurs whatever sits behind the element. On a plain white background there is nothing to blur, so the glass appears invisible. Test it over colorful gradients, images, or solid colors instead — the preview's Gradient Blobs background is ideal for this.
Which backdrop-filter blur value should I use?
A blur between 8 and 15px works well for most designs. Below about 5px the frosting is too faint, while above 20px the glass starts to look opaque. The best value depends on how busy your background is.
Does backdrop-filter work in Firefox and Safari?
Yes. backdrop-filter is supported in current versions of Chrome, Firefox, Safari, and Edge. The generated CSS also includes the -webkit-backdrop-filter prefix for older Safari. For legacy browsers, add a solid semi-transparent background as a fallback.
What background opacity looks best for a glass effect?
An opacity between 15% and 30% usually keeps the glass transparent enough to show the background while staying readable. For text on the panel, lean toward the higher end and pair it with at least 10px of blur and white text with a subtle shadow.
Can I use the uploaded image background in production?
The image upload is for preview only — it helps you see how the glass looks over real content. In production you would place the glass element over your own page content or background images. The image you upload here stays in your browser and is never sent anywhere.
Does glassmorphism affect performance?
backdrop-filter can be GPU-intensive, especially at high blur values. For smooth rendering, use glassmorphism on a few key elements such as cards or navigation bars rather than every component, and keep blur values reasonable — generally under 20px.
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