CSS Box Shadow Generator / Parser
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About CSS Box Shadow Generator / Parser
This tool helps you build CSS box-shadow values visually and parse existing box-shadow strings.
It is useful for UI design, CSS debugging, design systems, and quick shadow experimentation.
How to use the tool
- Enter offset, blur, spread, color, and inset values to generate a box-shadow.
- Or paste an existing box-shadow string into the input field and click Parse.
- Review the live preview.
- Copy the generated CSS value when it looks right.
Tips
- Larger blur values create softer shadows.
- Negative spread can make shadows look tighter.
- Inset shadows are useful for pressed or recessed UI elements.
- RGBA colors are ideal when you want soft transparent shadows.
Box shadow checks before applying elevation
Shadows can communicate depth and focus, but they also affect perceived contrast, clipping, performance, and visual consistency across themes.
Define the elevation scale
Use a small set of deliberate shadow levels instead of custom values for every card, button, modal, and hover state.
Check clipping and overflow
Inspect shadows inside scroll containers, rounded parents, transformed elements, dialogs, sticky headers, and near viewport edges.
Test light and dark themes
Adjust opacity, spread, blur, and color so shadows remain subtle in light mode and visible without haze in dark mode.
Profile large surfaces
Avoid animating expensive shadows on large or repeated elements when transform, opacity, or a pseudo-element can create the effect.
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