Design complex layered box shadows with a visual editor. Add multiple layers, adjust blur, spread, offset, and color — copy production CSS instantly.
The CSS Box Shadow Studio is a visual editor for building layered box-shadow values. Drag the offset, blur, spread and colour controls, stack multiple shadow layers on one element, and copy production-ready CSS. It previews on a live element so you see the exact result before it reaches your stylesheet.
The box-shadow property takes up to five values in order: horizontal offset, vertical offset, blur radius, spread radius and colour, with an optional inset keyword to draw the shadow inside the element instead of outside.
Offsets move the shadow. Blur softens its edge. Spread grows or shrinks the shadow before blurring — a negative spread is the trick behind tight, modern shadows that hug the element instead of pooling around it.
Real objects do not cast one shadow. They cast a tight contact shadow where they meet the surface and a wide ambient shadow further out. A single box-shadow gives you one or the other, which is why one-line shadows often look flat or muddy.
Stack two or three layers: a small, low-blur, low-opacity layer for contact, then a larger, high-blur layer for ambience. Keep every layer the same hue and only vary opacity and blur. This tool lets you add and reorder layers and outputs the comma-separated value in the correct order.
Box shadows are cheap to paint but expensive to animate. Never animate the box-shadow property directly on hover across a large grid — animate a pseudo-element's opacity instead, or the browser repaints on every frame.
Shadows must not be your only way of communicating state. If a focused input is indicated only by a shadow, users with low vision or high-contrast mode will miss it entirely. Pair shadow with an outline or a border colour change.
Use a large blur with low opacity and a slight downward offset: box-shadow: 0 8px 24px rgba(0,0,0,0.12). Add a second tight layer — 0 1px 2px rgba(0,0,0,0.08) — for a contact shadow that makes the card feel grounded.
Blur softens the shadow's edge outward from its shape without changing its size. Spread changes the shadow's size before it is blurred — positive spread makes it bigger than the element, negative spread makes it smaller so the shadow tucks under the element.
The inset keyword draws the shadow inside the element's border box instead of outside it. It is how you create pressed buttons, recessed input fields and inner glow effects.
Yes — separate each shadow with a comma. The first shadow in the list renders on top. Layering two or three shadows with different blur values is the standard technique for realistic depth.
Static shadows are inexpensive. Problems appear when you animate box-shadow on many elements at once, because each frame forces a repaint. Animate opacity on an absolutely-positioned pseudo-element instead for smooth 60fps hover effects.
Yes — free, unlimited, no signup. Everything runs in your browser and the generated CSS is yours to use in any commercial project.
CSS Box Shadow Studio is a free, no-signup tool built by Digital Bridge, an AI web design, SEO and automation agency in Gorey, Co. Wexford, working with businesses across all 32 counties of Ireland.