Box Shadow Generator
Create CSS box shadows with multiple layers. Adjust offset, blur, spread, and color.
Shadow Layers
Shadow Settings
Presets
Preview Box
Preview
.element {
box-shadow: 0px 4px 12px 0px rgba(0, 0, 0, 0.2);
}Shadow Value
0px 4px 12px 0px rgba(0, 0, 0, 0.2)What is a Box Shadow Generator?
A Box Shadow Generator is an interactive CSS tool that lets you visually configure box-shadow properties — including x/y offset, blur radius, spread radius, color, and inset/outset position — and instantly preview the result on a sample element. Instead of manually tweaking values and refreshing your browser, you get real-time feedback and ready-to-copy CSS output. Developers use it to prototype shadow effects quickly, build consistent design systems, and eliminate the trial-and-error of writing multi-layer shadow syntax by hand.
How to Use This Tool
- 1 Configure your first shadow layer by adjusting the horizontal offset (x), vertical offset (y), blur radius, and spread radius sliders — watch the preview element update in real time as you drag each control.
- 2 Set the shadow color and opacity using the color picker, then toggle the inset checkbox if you want the shadow to appear inside the element rather than outside it.
- 3 Add additional shadow layers using the 'Add Layer' button to stack multiple box-shadows — remember that the first listed layer renders on top, so order your layers intentionally for complex depth effects.
- 4 Copy the generated CSS output directly into your stylesheet — the property is ready to paste as-is, including the full multi-layer comma-separated syntax if you created more than one layer.
Common Use Cases
Card and Container Elevation
Apply layered shadows to card components to simulate material elevation levels, making content blocks visually lift off the page and establish clear depth hierarchy in dashboards or listing UIs.
Interactive Button Feedback
Create pressed and raised shadow states for buttons — a larger outset shadow for the default state and a reduced or inset shadow on :active — giving users tactile visual feedback without JavaScript.
Modal and Overlay Depth
Generate a strong, diffuse shadow for modal dialogs and dropdown menus to visually separate them from the background content, reinforcing the layered z-index structure of your UI.
Design System Shadow Tokens
Rapidly prototype a consistent shadow scale (e.g., shadow-sm, shadow-md, shadow-lg) by generating and comparing multiple presets, then document the CSS values as reusable design tokens across your project.
Tips & Best Practices
- → Stack a sharp, low-blur shadow with a soft, high-blur shadow on the same element to create realistic depth — for example, combine a 2px/4px tight shadow with a 10px/20px diffuse shadow using a semi-transparent dark color for both.
- → Use rgba or hsla colors with low opacity (0.08–0.20) rather than solid hex values so shadows look natural across both light and dark backgrounds without hardcoding a specific contrast.
- → When your element already has a border-radius, the box-shadow inherits those rounded corners automatically — so you don't need to compensate in the shadow settings, just focus on offset and blur values.
- → Avoid using box-shadow on PNG images or SVGs with transparent backgrounds — use the CSS filter: drop-shadow() function instead, which traces the actual shape rather than the rectangular bounding box.
Frequently Asked Questions
What is a box shadow generator and what does it do? +
A box shadow generator is an online tool that provides a visual interface for building CSS box-shadow declarations. You adjust sliders and color pickers for each shadow parameter, preview the result instantly on a sample element, and copy the generated CSS code directly into your project — no manual syntax writing required.
How is box-shadow different from drop-shadow or text-shadow? +
Box-shadow applies to the rectangular bounding box of an HTML element like a div, button, or card, regardless of its visual shape. Text-shadow applies exclusively to rendered text characters, while the CSS filter drop-shadow() traces the actual visible shape of an element including transparent areas — making it the better choice for images and SVGs.
Can I create multiple shadow layers with this tool? +
Yes — the generator supports multiple shadow layers on a single element, which is standard CSS behavior. Layers are rendered in the order they are listed, with the first layer appearing on top. Multiple layers let you combine a sharp contact shadow with a soft ambient shadow for more realistic depth effects.
Is the generated box-shadow CSS cross-browser compatible? +
The box-shadow property has been part of the CSS specification since CSS3 and is fully supported in all modern browsers without vendor prefixes. The code output from the generator can be used directly in production without additional preprocessing or compatibility shims.
Does using multiple box-shadow layers hurt performance? +
Standard box-shadow declarations are GPU-accelerated in modern browsers and have minimal performance impact in typical use. However, stacking many layers with very high blur-radius values on frequently repainted elements — such as those inside scroll containers or CSS animations — can increase rendering cost on lower-end devices, so use complex shadows purposefully.
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