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Box Shadow Generator
Tune a box shadow visually and copy the CSS.
Tool Panel
Processed locallyAbout Box Shadow Generator
Offset, blur, spread and colour with a live preview, plus an optional inset shadow. The output is a standard box-shadow declaration.
- 1
Each parameter does one thing: X and Y place the shadow, blur softens its edge, spread scales the shape before the blur is applied, and the colour sets the tint.
- 2
Spread can go negative to pull the shadow in tight against the element, and a negative Y drops it above instead of below.
- 3
The colour carries alpha by default (#0f172a40 is 25% opacity) and the swatch only edits the RGB part, keeping the alpha — so recolouring never turns a soft shadow solid.
- 1
Drag the four sliders
Pick a direction first, then shape it with blur and spread; each value is shown next to its label.
- 2
Set the colour and inset
Inset draws the shadow inside the element (recessed panels, input wells). The swatch edits RGB and keeps the existing alpha.
- 3
Copy the CSS
The output is one `box-shadow` line, ready for a stylesheet.
Blur softens the edge, fading both inward and outward. Spread first enlarges (positive) or shrinks (negative) the shadow shape, and the blur is applied afterwards. A large blur with negative spread gives a wide soft glow, while a small blur with positive spread keeps a crisp edge.
This tool emits one at a time. CSS itself accepts a comma-separated list, `box-shadow: a, b`, where the order is the paint order — the first entry sits on top. Combine two outputs to get the usual layered look: one tight shadow close in and one wide shadow further out.
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