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CSS Box Shadow Generator

Build single or multi-layer CSS shadows with live preview and downloadable snippets.

Shadow Layers

Layer 1

Inset

X OffsetY OffsetBlurSpread

Color

Opacity

Layer 2

Inset

X OffsetY OffsetBlurSpread

Color

Opacity

PreviewLive

OutputCSS

box-shadow: 0px 18px 42px -18px rgba(15, 23, 42, 0.32), 0px 4px 10px -4px rgba(34, 211, 238, 0.16);

CSS Box Shadow Generator: complete usage guide

Create production-ready CSS box-shadow values for cards, dialogs, and layered UI surfaces while validating blur, spread, and opacity combinations before design handoff.

What this tool does

It generates valid box-shadow declarations from visual controls so you can iterate quickly without manual trial and error.

It supports multi-layer shadow composition for modern depth systems used in design tokens and component libraries.

It helps teams standardize elevation behavior across hover, focus, and resting states in one repeatable workflow.

Typical use cases

Build shadow presets for card, modal, and dropdown component sets.
Match Figma-style shadow values to CSS tokens without transcription mistakes.
Tune dark-theme and light-theme elevation contrast before QA review.
Generate consistent hover and active shadow transitions for interactive elements.

Input examples

Base layer

x: 0, y: 8, blur: 24, spread: -8, color: rgba(15,23,42,0.24)

Soft layer

x: 0, y: 2, blur: 6, spread: 0, color: rgba(15,23,42,0.12)

Inset sample

inset 0 1px 0 rgba(255,255,255,0.35)

Output examples

Single shadow

box-shadow: 0 8px 24px -8px rgba(15, 23, 42, 0.24);

Layered shadow

box-shadow: 0 8px 24px -8px rgba(15,23,42,0.24), 0 2px 6px rgba(15,23,42,0.12);

Token note

Store approved values as semantic tokens such as --shadow-surface-md and --shadow-surface-lg.

Common errors and fixes

Shadow looks muddy on dark backgrounds

Lower opacity and adjust spread to keep edges readable.

Blur radius causes clipping

Increase container overflow area or reduce blur for constrained layouts.

Inset and outset mixed unintentionally

Verify each layer order and whether inset is required.

Hover state jumps too aggressively

Animate shadow tokens with eased transition and smaller delta steps.

Security and privacy notes

Style generation runs locally in your browser.
If sharing screenshots, remove any private brand assets from preview canvases.
Keep design token naming consistent across repositories to avoid accidental leakage in public snippets.

Step-by-step workflow

Start with a minimal input for CSS Box Shadow Generator and verify baseline behavior first.
Make assumptions explicit: encoding, delimiter strategy, and timezone.
Change one variable at a time and compare output diffs.
Keep one verified output snapshot as a team reference.

Quality checklist before sharing output

Confirm CSS Box Shadow Generator output is deterministic across repeated runs with identical input.
Check boundary inputs (empty values, long fields, invalid characters).
Remove sensitive data before sharing output externally.
Verify final rendering on both desktop and mobile viewports.