Does box-shadow affect performance?

Large blur values and many layers can impact rendering, especially during animations. Consider filter: drop-shadow() or pre-rendered images as alternatives.

What's the difference between box-shadow and filter: drop-shadow?

box-shadow creates a shadow around the element's box. filter: drop-shadow() follows the element's opaque shape.

Is my data sent to a server?

No. All processing happens entirely in your browser.

CSS Box-Shadow Generator｜Multi-Layer & Presets

📖 About 🔰 How to Use 📚 Properties ❓ FAQ 💡 Use Cases

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Browser-Only Processing

No data is ever sent to a server

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No Sign-Up

Use instantly without creating an account

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Instant Preview

All changes update in real-time

X Offset4px

Y Offset4px

Blur12px

Spread0px

Opacity15%

Inset shadow

Element Width200px

Element Height150px

Border Radius12px

Background

Element Color

CSS Box-Shadow Generator is a free online tool that lets you visually create box-shadow effects for web elements. Layer multiple shadows for realistic depth, use neumorphism and Material Design presets, and export code in CSS, CSS Variables, or Tailwind format.

Adjust X/Y offset, blur, spread, color, and opacity with intuitive sliders. Preview changes in real-time and copy the generated code with a single click.

All processing happens in your browser — no data is ever sent to a server. No sign-up required.

Pick a Preset or Add a Layer

Choose from the preset gallery above, or click "+ Add Layer" to start from scratch.

Fine-Tune with Sliders

Adjust X/Y offset, blur, spread, color, and opacity. Stack multiple layers for more realistic shadows.

Copy the Code

Select CSS, CSS Variables, or Tailwind format and click 📋 to copy. Paste directly into your project.

The box-shadow CSS property adds one or more shadow effects to an element's box.

Value	Description	Default
`offset-x`	Horizontal position. Positive = right, negative = left	required
`offset-y`	Vertical position. Positive = down, negative = up	required
`blur-radius`	Blur amount. Larger = softer shadow	0
`spread-radius`	Shadow expansion/contraction	0
`color`	Shadow color, typically `rgba()`	currentColor
`inset`	Draws shadow inside the element	none

Syntax

box-shadow: [inset] offset-x offset-y blur-radius spread-radius color;

Multiple shadows can be separated by commas. Earlier values are drawn on top.

Browser Support

Supported in all major browsers (IE9+). No vendor prefixes needed.

Q. Does box-shadow affect performance?: A. Large blur values and many layers can impact rendering, especially during animations. Consider filter: drop-shadow() or pre-rendered images as alternatives.
Q. What's the difference between box-shadow and filter: drop-shadow?: A. box-shadow creates a shadow around the element's box (rectangle). filter: drop-shadow() follows the element's opaque shape (respects transparent PNG regions).
Q. When should I use inset?: A. Inset is great for pressed button states, inner field shadows, and neumorphism concave effects.
Q. Is my data sent to a server?: A. No. All processing happens entirely in your browser.

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Card UI

Add natural floating effects to product cards and blog post cards for visual hierarchy.

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Buttons

Give CTA buttons depth and interactive hover transitions.

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Modals & Dialogs

Use large blur + dark shadow to elevate modals and direct user focus.

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Neumorphism

Combine light/dark shadows for the soft 3D UI style popular in modern SaaS dashboards.

CSS