Adding elevation and depth to web elements is crucial for modern user interfaces, helping users distinguish layout hierarchy. Our free CSS Box Shadow Generator provides an interactive visual control panel to craft drop shadows and inner inset shadows. Adjust horizontal and vertical offsets, blur radius, spread expansion, and opacity sliders to customize shadow softness and size. Select custom color values, toggle inset mode, and preview card elevations on light or dark backdrops. Compiles clean box-shadow property declarations ready for immediate stylesheet integration. Executing 100% in local client-side JavaScript—your style parameters are never uploaded to any server.
Use the range sliders to define horizontal and vertical offsets, blur radius softness, and spread radius extension.
Choose your shadow color value, adjust transparency opacity, and toggle the inset checkbox if you need an inner shadow.
Inspect the rendering block elevation preview and click the Copy Shadow CSS button to export the code to your clipboard.
Generates clean CSS3 property shorthand declarations (box-shadow: 0px 10px 25px -5px rgba(0,0,0,0.1)) or inset variations, ready to integrate into your stylesheet.
Enables modeling of both classic drop shadows (outset) and recessed inner depths (inset), helping designers create realistic paper elevations or card indent layouts.
Calculates shadow color blending and coordinate shifts locally using JS events, guaranteeing fast redraw performance with zero network transfer overhead.
box-shadow property accepts up to six values: horizontal offset, vertical offset, blur radius, spread radius, color (including RGBA), and an optional inset keyword.rgba(0, 0, 0, 0.1).inset parameter draws the shadow inside the boundary, creating a recessed, sunken, or carved-in effect, which is ideal for modeling text inputs and toggle buttons.box-shadow property standard for over a decade.
The CSS box-shadow property enables developers to apply drop shadows to the frame of an element. The standard layout syntax structure contains key offset values: horizontal offset, vertical offset, blur radius, and spread radius, followed by the color structure. When styling modern user interfaces, utilizing RGBA color notations (e.g., rgba(0, 0, 0, 0.15)) is the industry best practice, as it mixes the shadow colors naturally with any dynamic backgrounds.
Web layout elevation mimics light source physics. Outset shadows create drop-shadow profiles that simulate element height relative to the page backdrop. For instance, cards with larger blur radii look further away from the canvas. Conversely, using the inset keyword models inner depth, rendering concave shapes. Tuning these values visually using range controls helps designers achieve perfect elevations without manually writing test stylesheet styles.
Modern UI designers often stack multiple box shadows to achieve high-fidelity visual rendering. Stacking allows you to blend sharp ambient occlusions with soft, distant drop glows. While multiple layers look premium, excessive shadow rendering on scroll-heavy containers can impact rendering pipeline frames. This client-side tool computes the properties instantly in your browser memory sandbox, letting you copy standard outputs with zero latency.