Box Shadow Generator

Create Perfect CSS Box Shadows Without Guesswork

The CSS box-shadow property is deceptively simple in concept but surprisingly difficult to get right by hand. It accepts up to six values: horizontal offset, vertical offset, blur radius, spread radius, color, and an optional inset keyword. Small changes to any of these values dramatically alter the visual result. Writing shadow values in code and refreshing the browser to see the effect is an inefficient loop that eats into development time.

This visual generator lets you manipulate each parameter with sliders and see the result instantly on a live preview element. When the shadow looks right, you copy the generated CSS and move on. No guessing, no refreshing, no wasted cycles.

Understanding Box Shadow Parameters

The horizontal and vertical offsets control the direction the shadow falls. Positive horizontal values push the shadow to the right, and positive vertical values push it downward. Setting both to zero centers the shadow evenly around the element, which is common for ambient glow effects.

The blur radius controls how soft or sharp the shadow edge appears. A value of zero produces a hard, crisp shadow edge. Higher values create a gradual fade from the shadow color to transparency. The spread radius expands or contracts the shadow relative to the element’s size. Positive spread makes the shadow larger than the element, while negative spread makes it smaller, which is useful for tight, focused shadows.

Color and opacity complete the picture. Subtle shadows typically use black or dark gray at low opacity. Colored shadows can add creative depth, especially on cards and buttons over colored backgrounds.

Layered Shadows for Realistic Depth

Flat design is giving way to depth-rich interfaces where shadows convey hierarchy. A single shadow often looks artificial. Designers layer multiple shadows with different offsets, blur values, and opacities to simulate how light interacts with surfaces in the real world. This tool supports unlimited shadow layers, each configurable independently, making it straightforward to build sophisticated multi-layer effects.

From Design to Code in Seconds

The tool outputs a standards-compliant CSS box-shadow declaration ready to paste into any stylesheet, CSS module, styled-component, or Tailwind arbitrary value. No browser prefixes are necessary since box-shadow enjoys universal modern browser support.