Backdrop Filter · Specular Borders · CSS & Tailwind

Glassmorphism Generator

Build modern frosted glass UI cards with genuine depth and optical realism. Adjust blur, specular border reflections, and saturation with 1-click CSS code export.

Presets:

Frosted Glass Optics

Blur Radius16px

Surface Opacity20%

Glass Tint Color:

#ffffff

Backdrop Saturation180%

Specular Border & Shadow

Border Width1px

Border Radius24px

Border Brightness35%

Drop Shadow Blur25px

Backdrop:

SPEEDDRAIN

•••• •••• •••• 4289

Cardholder

ALEX MORGAN

Expires

08/29

/* Glassmorphism Effect */
background: rgba(255, 255, 255, 0.20);
backdrop-filter: blur(16px) saturate(180%);
-webkit-backdrop-filter: blur(16px) saturate(180%);
border: 1px solid rgba(255, 255, 255, 0.35);
border-radius: 24px;
box-shadow: 0 8px 25px 0 rgba(0, 0, 0, 0.15);

Glassmorphism UI Aesthetics, Accessibility & Performance

1The Anatomy of Convincing Frosted Glass

Translucent Fill: An rgba(255, 255, 255, 0.15) to 0.25 base fill acts as the physical glass sheet.
Hardware-Accelerated Blur: backdrop-filter: blur(16px) diffuses background light and sharp geometries behind the panel.
Specular Edge Reflection: Glass has physical thickness. A subtle 1px border with 30% white opacity mimics light catching the bevel of the glass edge.
Vibrancy Boost: Adding backdrop-filter: saturate(180%) prevents colors beneath the frosted glass from looking muddy or washed out.

2GPU Performance Pitfalls & Text Legibility

CSS backdrop-filter requires the browser Compositor to render the layer below, apply a multi-pass Gaussian blur shader on the GPU, and composite back to the display buffer.

• Avoid nesting multiple blurred layers inside each other

• Always include -webkit-backdrop-filter for Safari iOS support

• Ensure typography on top of frosted panels passes 4.5:1 WCAG contrast

When used judiciously for sticky headers, modal dialogs, and floating control bars, glassmorphism establishes natural visual hierarchy without visual clutter.