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TabBench

CSS Box Shadow Generator

Generate multi-layer CSS box shadows with interactive preview, dark mode canvas, and Tailwind classes.

Runs in your browser. Nothing you add is uploaded.

What the CSS Box Shadow Generator does

High-quality digital UI design relies on subtle, multi-layered shadows to convey realistic depth, elevation, and tactile hierarchy. Single-layer box shadows often look harsh or artificial. This generator allows designers and frontend developers to layer up to 5 box shadows, test them on light and dark canvases, and export pure CSS or Tailwind arbitrary classes.

How to generate multi-layer box shadows

  1. Select a starting preset (Subtle Card, Floating Elevation, Neon Glow) or build from scratch.
  2. Add or remove shadow layers and toggle individual layer visibility with the eye icon.
  3. Fine-tune X offset, Y offset, blur radius, spread radius, and opacity for the active layer.
  4. Switch between light and dark canvas backgrounds to verify contrast across color themes.
  5. Copy the resulting CSS box-shadow property or Tailwind arbitrary class (shadow-[...]).

The CSS Box Shadow Generator runs entirely in your browser — nothing you enter is uploaded, stored, or logged.

When to use it

Modern Design System Elevation Tokens

Build layered elevation scales (elevation-1 through elevation-5) for design systems with smooth ambient occlusion and key light shadows.

Cyberpunk and Dark Mode Neon Glows

Stack multiple colored blur layers with zero offset to create radiant glowing buttons and illuminated borders.

Inset Card and Bevel Styling

Enable the inset toggle on a top layer to create subtle inner rim highlights or recessed neumorphic form inputs.

Good to know

  • For natural lighting, make layer 1 small with low blur (sharp contact shadow) and layer 2 large with high blur (ambient light).
  • Keep opacity low (between 5% and 15%) for clean, professional cards that don't overwhelm content.
  • Tailwind's arbitrary syntax replaces spaces with underscores: shadow-[0_10px_25px_-5px_rgba(0,0,0,0.1)].

Frequently asked questions

Why use multi-layer box shadows instead of a single shadow?

Real-world light bounces in multiple ways. Stacking two or three subtle shadows with different blurs and spreads produces a much smoother, higher-end elevation effect that avoids harsh, unnatural edges.

Can I use the output in Tailwind CSS?

Yes. The generator produces exact Tailwind CSS arbitrary values like shadow-[0_10px_25px_-5px_rgba(0,0,0,0.1)] ready to paste directly into your JSX or HTML.

What does the spread radius do in box-shadow?

Spread expands or contracts the shadow shape before blurring. A negative spread shrinks the shadow so it doesn't spill over card edges, creating a tighter, cleaner elevation look.

Can box-shadow affect performance?

Heavy shadows with massive blur radii (over 100px) on frequently animated elements can trigger GPU paint overhead. For static cards and modals, modern hardware renders them with zero lag.

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