Box Shadow Generator

Create shadow effects for your website boxes and copy the CSS.

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100% Client-Side PrivacyProcessed entirely in browser memory with zero server storage.

Instant Real-Time ExecutionZero latency data manipulation powered by Web APIs.

Free & UnrestrictedNo accounts, subscriptions, or daily usage limits.

Technical Overview: How Box Shadow Generator Works

The Box Shadow Generator creates layered CSS `box-shadow` styles with visual controls for horizontal offset, vertical offset, blur radius, spread radius, color, opacity, and inset shadows.

Generates standard CSS `box-shadow` declarations supporting single and multi-layered shadows (`box-shadow: x y blur spread color, ...`). Multi-layered shadows create smooth, realistic depth by blending subtle ambient light with sharp directional shadows.

Practical Examples & Usage

Smooth 2-Layer Elevation Shadow

Input:Layer 1: 0 4px 6px -1px rgba(0,0,0,0.1), Layer 2: 0 2px 4px -2px rgba(0,0,0,0.1)

Output:box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);

Combines a broad soft ambient blur with a tighter direct shadow for realistic material depth.

Real-World Applications & Use Cases

Creating realistic elevation design systems (cards, modals, dropdown menus, floating action buttons).
Designing subtle neumorphic and soft UI interface components.
Generating inset shadow effects for active button press states and recessed input fields.
Exporting optimized CSS shadow rules with transparent `rgba()` color values.

How to use Box Shadow Generator

Adjust the Horizontal and Vertical offset sliders to position the shadow.
Modify the Blur and Spread sliders to control the shadow's diffusion and size.
Use the color picker to select the shadow color and adjust its opacity.
Toggle between "Inset" and "Outline" shadow types for different depth effects.
Click the "Copy" button to grab the fully formatted CSS rule for your project.

Edge Cases & Limitations

•Heavy box shadows with large blur radii (>50px) on scrolling lists can impact GPU rendering performance on low-end mobile devices.
•`box-shadow` does not follow transparent image alpha contours; use `filter: drop-shadow(...)` for transparent PNGs and SVGs.
•Negative spread values shrink the shadow boundary smaller than the parent element box.

Recommended Best Practices

•Use multiple subtle shadow layers with low opacity rather than a single harsh dark shadow for realistic depth.
•Match shadow color hue slightly to the background color (e.g. deep navy shadow on dark blue backgrounds) rather than pure black.
•Define elevation steps (Elevation 1, 2, 3) as design tokens to maintain uniform depth across application components.

Frequently Asked Questions

How do I add multiple shadows to an element?

CSS supports multiple shadows by separating them with commas. You can generate multiple shadows using our tool and manually combine them in your stylesheet.

Does this tool generate vendor prefixes?

Modern browsers no longer require vendor prefixes (like -webkit-) for box-shadow, so our tool outputs clean, standard CSS for maximum efficiency.

Can I create neumorphic designs with this?

Absolutely. Neumorphism heavily relies on dual box shadows (one light, one dark). You can use this tool to perfect the exact offset and blur values needed.

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