Glassmorphism Generator
Design a glassmorphism / frosted-glass effect with live sliders for blur, saturate, and brightness, background tint, border, and shadow — with a real live preview over a busy background and CSS that includes the -webkit-backdrop-filter prefix.
Nothing leaves the browser. The preview and generated CSS are built entirely on this device — there is no network request, no logging, and nothing is saved.
Glass card
This panel is styled with the exact CSS generated below, live, over a busy background so the blur is easy to see.
CSS
background: rgba(255, 255, 255, 0.25);
border-radius: 16px;
box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
backdrop-filter: blur(12px) saturate(180%) brightness(105%);
-webkit-backdrop-filter: blur(12px) saturate(180%) brightness(105%);
border: 1px solid rgba(255, 255, 255, 0.3);Glassmorphism is a frosted-glass look: a translucent panel that blurs whatever sits behind it, with a subtle light border and a soft shadow to sell the sense of a physical pane of glass. The effect itself is one CSS property — backdrop-filter — plus a handful of supporting styles that make it actually read as "glass" instead of just "blurry."
Drag the sliders to shape the blur, saturation, and brightness of the backdrop filter, the tint and opacity of the glass itself, and the border and shadow that give it depth — the preview updates live using the real CSS properties, over a busy background so the blur is actually visible (a flat background makes blur nearly impossible to see).
The generated CSS always includes both backdrop-filter and -webkit-backdrop-filter with identical values, since Safari has historically needed the prefixed version.
How to use this generator
- 1Pick a preset to start from, or adjust the sliders directly.
- 2Blur is the effect itself; saturate and brightness push the frosted look further — higher saturate makes colors behind the glass pop more, and brightness lightens or darkens what shows through.
- 3Tune the background tint's color and opacity, the border opacity, and the shadow to match your design.
- 4Copy the CSS and apply it to any element with content behind it — backdrop-filter has nothing to blur if there's nothing behind the element.
What each property is doing
| Property | Role | Typical range |
|---|---|---|
| backdrop-filter: blur() | The frosted-glass effect itself | 8px – 20px |
| backdrop-filter: saturate() | Boosts color intensity behind the glass | 120% – 200% |
| backdrop-filter: brightness() | Lightens or darkens what shows through | 90% – 110% |
| background (translucent) | The glass panel's own tint | 15% – 30% opacity |
| border (white, translucent) | A light edge highlight that reads as glass | 20% – 40% opacity |
| box-shadow | Depth — lifts the panel off the background | soft, low-opacity, large blur radius |
Frequently asked questions
Why doesn't backdrop-filter show any effect on my element?+
backdrop-filter blurs whatever is rendered behind the element, so it needs something behind it to actually blur — a plain solid-color page background won't show a visible effect since there's no detail there to blur. It also needs the element (or an ancestor) to not have overflow: hidden combined with certain stacking contexts in some edge cases, and the element's own background needs to be at least partially transparent, or the blurred content underneath won't be visible through it at all.
Is -webkit-backdrop-filter still necessary?+
For broad compatibility, yes — Safari required the -webkit- prefix for years, and while recent Safari versions accept the unprefixed property too, including both costs nothing and avoids silently breaking the effect for anyone on an older Safari release. This generator always outputs both with identical values.
Why does text inside my glass panel look hard to read?+
A frosted panel sitting over a busy or high-contrast background can leave text with poor contrast against whatever happens to blur through underneath, especially at low background opacity. Raising the background tint's opacity, adding a subtle text-shadow, or choosing a background opacity high enough to guarantee sufficient contrast against your busiest expected backdrop are the usual fixes — always check actual contrast rather than assuming it looks fine on one test background.
Does backdrop-filter hurt performance?+
It can — blurring is one of the more expensive filter operations, especially at a large blur radius applied to a large area, or when many glass panels overlap and each needs to blur independently. If you notice jank, try reducing the blur radius, limiting how many glass elements are visible and animating at once, or applying it to a smaller area.
Is glassmorphism accessible?+
It can be, but it takes care — reduced-transparency and reduced-motion preferences exist for a reason, and some users configure their OS/browser to disable translucency effects entirely for readability or vestibular reasons. Consider wrapping the effect in a prefers-reduced-transparency media query fallback (a solid background) for users who've asked for less visual noise, and always verify text contrast independently of how the effect looks by default.
Related tools
Color Converter
Convert hex, RGB, HSL, OKLCH, and Lab — plus a WCAG contrast checker.
Open toolImage Compressor & Converter
Compress and convert images to JPEG, PNG, or WebP — in your browser.
Open toolCubic Bezier & Easing Editor
Design cubic-bezier() and linear() CSS easing curves visually.
Open toolCSS clip-path Editor
Design polygon, circle, ellipse, and inset clip-path shapes visually.
Open toolPalette Generator
Generate a tint/shade scale from one brand color in OKLCH.
Open tool