CSS Box Shadow & Glassmorphism Generator

Glassmorphism became popular because it makes interfaces feel layered and modern without heavy imagery. The core recipe is a semi-transparent background, a backdrop blur that frosts whatever sits behind the element, a hairline border for definition, and a soft shadow for elevation. Getting the balance right is the difference between elegant glass and muddy gray boxes.

Start with the background: use rgba white or black at low alpha, such as rgba(255,255,255,0.1) on dark themes. Apply backdrop-filter: blur(10px) to frost the content behind the card. Because backdrop-filter is not universal, include a fallback solid or gradient background so the element still looks intentional where blur is unsupported.

Borders are what sell the effect. A 1px border with low-alpha white (rgba(255,255,255,0.18)) catches light on the edge, mimicking the rim of real glass. Skip the border and the shape reads flat. Pair this with a gentle outer shadow — something like 0 8px 32px rgba(0,0,0,0.12) — and the card appears to float above the page.

Layering helps realism. A bright inset highlight at the top and a darker outer shadow at the bottom simulates a light source from above. Our generator lets you stack layers and tint them, so you can match a brand palette instead of defaulting to gray.

Use glassmorphism sparingly. Too many blurred layers on one screen hurt readability and performance, especially on lower-end devices. Reserve it for hero cards, modals, and navigation bars where the effect draws focus. For body content, prefer solid surfaces. With the export options here you can copy a complete component and adapt it to your design system quickly.