Glassmorphism — frosted, translucent panels floating over vivid backgrounds — is the signature look of modern dashboards, banking apps and operating-system UI. The effect rests on four ingredients working together: a semi-transparent fill, a backdrop blur, a subtle light border and a soft shadow. This generator lets you tune all four over a colourful test backdrop with a realistic sample card, then copies the exact CSS, including the backdrop-filter line, for your own interface. Performance deserves a mention because backdrop-filter is genuinely expensive for browsers: every blurred region must be re-composited as content moves beneath it. One or two glass panels per view is comfortable everywhere; a full page of overlapping glass cards will make mid-range phones work hard. The graceful strategy is progressive — ship the transparency and border as the base look (which reads as glass on any colourful backdrop), then layer the blur where support and performance allow.
Quick Answer: Slide the blur and transparency until the sample card looks like frosted glass against the backdrop, adjust border and shadow to taste, then copy the CSS.
Free Online Tool
Glassmorphism Generator
Frosted panels float above vivid backdrops. Tune the sliders until it feels like real glass.
How to Use the Glassmorphism Generator
- Set the blur strength — the core of the frosted effect.
- Adjust transparency: lower is clearer glass, higher is milkier.
- Fine-tune the border opacity to catch the “edge light”.
- Add or soften the shadow so the card floats above the backdrop.
- Copy the CSS, including backdrop-filter, into your project.
Key Features
- Realistic sample card over a colourful backdrop
- Controls for blur, transparency, border and shadow
- Outputs both the standard and -webkit- backdrop-filter lines
- Live preview with realistic card content
- Free with no sign-up
Best Practices and Tips
- The effect only reads as glass over colourful or busy backgrounds — over plain white it disappears.
- Keep text contrast in mind: dark text needs a lighter, milkier glass; white text needs darker or stronger blur.
- A 1px border at 20–40% white opacity is what sells the glass edge.
- backdrop-filter needs the element itself to be at least slightly transparent to show anything.
- Test on real content: photos and gradients reveal the effect; flat UI colours hide it.
- Put a subtle top border lighter than the rest — rgba(255,255,255,.4) on the top edge only — to fake the light-catching rim that sells frosted glass instantly.
Common Mistakes to Avoid
- Setting the background fully opaque — then the blur has nothing to blur and the glass is just a box.
- Skipping the -webkit- prefix, which Safari still needs for backdrop-filter.
- Stacking many glass panels, which turns a clean UI into visual soup.
- Placing small low-contrast text on glass over a busy photo.
Frequently Asked Questions
What is glassmorphism?
A UI style that mimics frosted glass: translucent fills, background blur, light borders and soft shadows layered over colourful backgrounds.
Why does my card not blur the background?
The element needs a semi-transparent background and the backdrop-filter property; a fully opaque background blocks the effect entirely.
Does backdrop-filter work in all browsers?
All modern browsers support it; Safari uses the -webkit- prefixed version, which this generator includes automatically.
Can I use glassmorphism on text directly?
The effect applies to elements and their backgrounds; put text inside a glass panel element rather than on the text itself.
Is this generator free?
Yes — free, unlimited and no sign-up required.
Why does my glass look invisible on a plain background?
Glass is a relationship effect: with nothing colourful or detailed behind the panel there is nothing to frost. Add a gradient, photo or shapes behind it and the effect appears.