One auditable CSS property

Build multi-layer box shadows without rewriting CSS

Tune offsets, blur, spread, colour, opacity and inset while the browser renders the exact ordered layers. Copy one stable declaration; no value leaves the isolated capsule.

Open ShadowStack

No account · no network · 1–8 layers · deterministic CSS

Three explicit steps

Add, tune, copy

01

Choose the active layer

Each tab maps to one comma-separated shadow in exact paint order.

02

Tune explicit values

Offsets, blur, spread, colour, opacity and inset all appear in copied CSS.

03

Copy one declaration

Paste it into the real component and verify its boundary and focus states.

Developer and design handoff

Useful when visual depth needs exact CSS

  • Tune a restrained card or panel shadow and hand off the exact declaration.
  • Separate contact and ambient depth into independently reviewable layers.
  • Compare outer and inset geometry without rewriting syntax by hand.

Reproducible examples

Reproducible box-shadow examples

Compose the layers, copy the declaration, then verify boundaries, focus and compatibility in the component that will use it.
View examples

Local by construction

Turn visual depth into exact CSS

Compose the layers, copy the declaration, then verify boundaries, focus and compatibility in the component that will use it.

Open ShadowStack