CSS Box Shadow Generator — Create Beautiful Shadows Free

CSS box shadows can make a button feel clickable, a card feel elevated, and a UI feel polished — or they can make everything look muddy and overdone if the values are wrong. Getting the right combination of offset, blur, spread, and color by hand is tedious, especially when you are fine-tuning by eye.

Our free CSS Box Shadow Generator lets you adjust all the parameters with sliders and see the result live — then copy the finished CSS code in one click.

Understanding the CSS box-shadow Property

The box-shadow CSS property accepts several values:

`css box-shadow: [horizontal-offset] [vertical-offset] [blur-radius] [spread-radius] [color]; `

Or with inset:

`css box-shadow: inset [horizontal-offset] [vertical-offset] [blur-radius] [spread-radius] [color]; `

Breaking Down Each Parameter

Horizontal Offset (X) Moves the shadow left (negative) or right (positive). 0px centers it horizontally.

Vertical Offset (Y) Moves the shadow up (negative) or down (positive). A positive value creates the appearance of light coming from above.

Blur Radius Higher values create a softer, more spread-out shadow. 0px creates a sharp edge with no blur.

Spread Radius Expands or shrinks the shadow beyond the element's size. Positive values make the shadow larger; negative values contract it.

Color The shadow color. Use RGBA for transparency: rgba(0, 0, 0, 0.2) gives a 20% opaque black shadow — the most common choice for subtle shadows.

Inset Adding the inset keyword makes the shadow appear inside the element rather than outside. Used for pressed-button effects and inner glow.

Common Box Shadow Patterns

Subtle Card Shadow

For cards, containers, and panels — barely visible, just enough to separate from the background:

`css box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08); `

Elevated Card (Material Design style)

More pronounced elevation, like a floating card:

`css box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12); `

Button Hover Effect

A deeper shadow when hovered to simulate lifting:

`css / Default / box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);

/ On hover / box-shadow: 0 8px 24px rgba(0, 0, 0, 0.20); `

Pressed Button (Inset)

Simulates pressing the button inward:

`css box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.20); `

Colored Glow Effect

Using a non-black color creates a colored glow — popular for CTAs:

`css box-shadow: 0 4px 20px rgba(99, 102, 241, 0.40); `

Layered Shadow (Multiple Shadows)

CSS supports multiple shadows separated by commas, enabling more realistic layering:

`css box-shadow: 0 1px 2px rgba(0, 0, 0, 0.07), 0 4px 12px rgba(0, 0, 0, 0.07), 0 18px 40px rgba(0, 0, 0, 0.06); `

How to Use the Box Shadow Generator

The Box Shadow Generator on cleverly.tools gives you a live visual preview as you adjust each parameter:

1. Set X and Y offset using sliders — watch the shadow direction change in real time 2. Adjust blur radius — from crisp (0) to very soft (60+) 3. Adjust spread radius — make the shadow bigger or smaller than the element 4. Pick shadow color — use the color picker or enter a hex/RGBA value 5. Set opacity — fine-tune the transparency 6. Toggle inset — switch between outer and inner shadow 7. Copy CSS — the code updates as you drag; copy it in one click

You can also add multiple shadows and see how they layer together before copying the combined code.

Box Shadow Design Tips

Dark backgrounds need lighter shadows: RGBA black looks invisible on dark UIs. Use white at low opacity or a lighter shade of your brand color.

Subtlety reads as quality: Very heavy shadows look dated. Modern design trends favor soft, low-opacity shadows.

Consistency matters: Define 2–3 shadow levels (small, medium, large) in your design system and apply them consistently rather than using one-off values everywhere.

Animate shadows on interaction: Transitioning from a flat to elevated shadow on hover creates a satisfying interaction without JavaScript.

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FAQ

Can I generate an inset box shadow with this tool?

Yes. Toggle the "Inset" option in the CSS Box Shadow Generator and the shadow moves inside the element. This is useful for pressed-state buttons, inner glow effects, and embossed looks.

How do I create multiple box shadows in CSS?

Separate each shadow definition with a comma in the box-shadow property. Our generator supports multiple shadows — add them in the tool and copy the combined CSS output.

What is the difference between box-shadow and filter: drop-shadow()?

box-shadow follows the rectangular box of the element. filter: drop-shadow() follows the actual visible shape, including transparent areas in images and SVGs. For elements with irregular shapes, drop-shadow is more accurate.

Does box-shadow affect layout or performance?

Box shadows do not affect the document flow — they are purely visual and do not push other elements. Regarding performance, static shadows are very efficient. Animating box-shadow can be expensive; transitioning the opacity or transform properties alongside a static shadow is often faster.