How css box shadow generator works
The CSS box-shadow property adds one or more shadows to an element. A single shadow takes up to six values: horizontal offset, vertical offset, blur radius, spread radius, color, and the optional keyword inset for an inner shadow. Positive offsets move the shadow right and down; negative values move it left and up.
Blur softens the shadow's edges (0 is a hard edge, larger values are softer), and spread grows or shrinks the shadow's size. The color can be a hex value (with alpha, like #00000040 for 25% black) or an rgba()/rgb() value. Inset flips the shadow to render inside the element, useful for pressed or carved effects.
Adjust the sliders and color, and the preview updates instantly with the generated box-shadow applied. The output is a ready-to-paste CSS declaration you can drop straight into a stylesheet. Combine multiple shadows with commas for layered effects (this generator focuses on a single shadow).