Smart Box Shadow Generator

Create beautiful modern shadows visually with live UI previews, layered shadows, neumorphism, glow effects, and production-ready CSS / Tailwind / React export.

Live UI PreviewLayered ShadowsNeumorphismGlow EffectsTailwind Export

How to use

1

Pick a preset (optional)

Start from a Soft Card, Floating UI, Material Elevation, Apple Card, Neon Glow or Neumorphism preset — or build from scratch with the default single layer.

2

Adjust shadow layers

Edit the active layer's X/Y offset, blur, spread, colour, opacity and inset. Click a layer in the list to make it active; use Add Layer for realistic multi-shadow depth.

3

Pick an Apply Mode

Switch between Card, Button, Input, Floating Panel, Modal, Glass, Glow, and Neumorphism — each shows a real component using your shadow so you can validate it in context.

4

Copy the implementation

Choose CSS, HTML, Tailwind arbitrary value, or React JSX — or click Copy Full Pack to copy all four at once into your project.

When to use modern box-shadows

Elevated cards

Dashboard cards, pricing tiers, and product cards use shadows to lift content off the page and signal that it's an interactive surface.

Action buttons

Primary CTAs use a soft shadow to feel raised and clickable; the shadow can grow on hover for a tactile push-up effect that boosts perceived responsiveness.

Modals & popovers

Large diffuse shadows establish that a modal or dropdown is floating above the page content and that the underlying page is temporarily inactive.

Glass / blurred UI

Combined with backdrop-filter blur, soft outer shadows give translucent glass cards depth without losing their see-through quality.

Glow & gaming UI

Coloured 0-offset shadows with large blur produce vivid neon glows — staple of cyberpunk, gaming and dark-mode SaaS dashboards.

Neumorphism / Soft UI

Dual light + dark shadows on a flat background create the soft-plastic embossed look popularised by neumorphic design systems and smart home apps.

How it works

Layered engine

Each layer stores X, Y, blur, spread, hex colour, opacity, and inset flag. The output is built by joining layer strings with commas — CSS composites them automatically from front to back.

Real component previews

Switch the Apply Mode to render the current shadow on a real card, button, input, modal, glass surface, glow button, or neumorphism panel so you can validate the effect in context.

Tailwind exporter

Custom shadows are emitted as Tailwind 3+ arbitrary values (shadow-[…]) with underscores replacing spaces — copy-pasteable directly into JSX className strings.

4-format export

Every change regenerates CSS, HTML, Tailwind arbitrary value, and a complete React component all at once — copy a single tab or the full pack with one click.

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Frequently asked questions

Quick answers about this free online tool.

box-shadow is a CSS property that adds shadow effects around an element's frame. Syntax: box-shadow: offsetX offsetY blur spread color. You can stack multiple shadows by comma-separating them — this is how modern designers create depth and layered lighting. Adding the inset keyword renders the shadow inside the element instead of outside.

A single box-shadow value can list any number of shadow declarations separated by commas — the browser composites them from front to back (first one is drawn on top). Designers use this to mimic real lighting: one tight, dark shadow close to the element for the contact shadow, then a wider, softer, lighter shadow for ambient depth. Tools like Material Design and Apple's design system use 2–3 layered shadows on every elevated component.

Neumorphism (also called 'soft UI') is a design style that combines a flat solid background colour with two complementary box-shadows — a darker one offset down-right and a lighter one offset up-left — to create the illusion of a soft, plastic-extruded surface. It works best on muted backgrounds (e.g. #e0e5ec) where the shadows can be both seen. Switch the shadows to inset to create a depressed/pressed-in look.

For a glow effect, set offsetX and offsetY to 0, use a large blur value (16–40px), pick a vivid colour, and stack 2–3 shadows of increasing blur and decreasing opacity. Example: box-shadow: 0 0 16px rgba(168,85,247,0.55), 0 0 40px rgba(168,85,247,0.35). Glows look most natural on dark backgrounds and are widely used in gaming UIs, sci-fi interfaces, and modern dark-mode SaaS dashboards.

Yes — Tailwind ships a curated scale (shadow-sm, shadow, shadow-md, shadow-lg, shadow-xl, shadow-2xl, shadow-inner, shadow-none). For custom shadows, use the arbitrary value syntax: shadow-[0_10px_30px_rgba(0,0,0,0.12)]. Use underscores instead of spaces inside the brackets. Tailwind 3+ also supports shadow-colored utilities like shadow-blue-500/50 for vivid coloured shadows.

Shadows are how digital UIs communicate elevation and hierarchy. Without shadows, every element sits on the same plane and the interface feels flat. With well-tuned shadows, users instinctively understand which elements are interactive (raised buttons, floating menus), which are persistent (cards), and which are temporary (modals, popovers). Material Design even formalises this into a 24-level elevation system based purely on shadow depth.

Blur controls how soft the edges of the shadow are — a higher value makes the shadow more diffuse. Spread controls the size of the shadow's footprint before the blur is applied — positive spread makes the shadow larger than the element, negative spread shrinks it. Designers often combine a small positive blur with negative spread to create tight contact shadows, or zero blur with positive spread to create solid outline-style shadows.

Shadows are purely decorative and don't carry semantic meaning for screen readers — that part is accessibility-safe. The accessibility concern is contrast: shadows should never be the only signal of state or interactivity. Always pair shadow elevation with another cue (border, colour change, focus ring) so users with low vision or in high-contrast mode aren't lost. Also avoid pure-black shadows on dark backgrounds — they disappear entirely.