Best Free Online Box Shadow Generator

CSS box shadows add depth, elevation, and visual separation to UI elements, but the box-shadow property syntax — with its six values for offset, blur, spread, color, and inset — makes it hard to dial in exactly the effect you want without visual feedback. devtoolkit.sh's Box Shadow Generator provides sliders and inputs for every parameter with a live preview that updates instantly as you adjust values. You can add multiple shadow layers (stacked box-shadows) to create complex elevation effects like Material Design cards and floating buttons. The inset option creates inner shadows for pressed or recessed appearances. Color pickers with opacity control let you use semi-transparent shadows, which look more natural than opaque ones. The generated CSS is ready to copy and paste — one line you can drop straight into your stylesheet. Layering multiple subtle shadows with different offsets and blur values — rather than using a single harsh shadow — produces the realistic, soft elevation effects used in modern design systems, and the generator makes this technique easy to experiment with.

box-shadow: 4px 4px 10px 0px #000000;