Visually create CSS box-shadow values with real-time preview, multiple layers, and one-click copy.
box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.25); -webkit-box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.25);
The box-shadow property adds shadow effects around an element's frame. It accepts one or more comma-separated shadow values, each defined by horizontal offset, vertical offset, blur radius, spread radius, and color.
The full syntax is box-shadow: [inset] offset-x offset-y blur spread color. The inset keyword is optional and turns an outer shadow into an inner shadow. Blur and spread default to 0 when omitted.
The horizontal (offset-x) and vertical (offset-y) values position the shadow relative to the element. Positive horizontal values push the shadow right; positive vertical values push it down. Negative values move the shadow in the opposite direction.
The blur radius controls how diffused the shadow appears — higher values produce a softer, more spread-out shadow. The spread radius expands or contracts the shadow. A positive spread makes the shadow larger than the element; a negative value shrinks it.
You can layer multiple shadows on a single element by separating them with commas. This technique is used for realistic depth effects, material-design elevations, and creative glow or neon effects.
Box shadows are rendered by the GPU on modern browsers, but complex multi-layer shadows with large blur radii can impact rendering performance — especially on low-powered mobile devices and during scroll animations. Use the minimum blur and layer count needed to achieve the visual effect.
The box-shadow property is supported by all modern browsers. The -webkit-box-shadow prefix is included for legacy support but is no longer required for current versions of Chrome, Safari, Firefox, or Edge.
box-shadow value and paste it directly into your stylesheet.Blur controls how diffused the shadow edge appears — higher values create a softer, more gradual fade. Spread expands or shrinks the shadow size relative to the element. A positive spread makes the shadow larger; a negative spread makes it smaller than the element itself.
Yes. CSS supports comma-separated shadow values on a single element. Layering a tight, dark shadow with a wider, lighter shadow creates realistic depth. This generator lets you add and configure each layer independently.
Modern browsers handle box shadows efficiently via GPU rendering. However, large blur radii on many elements — especially during scroll animations — can cause jank on low-powered devices. Keep blur values moderate and test on mobile. For design system work, pair this with the Color Converter and our UI/UX design services.