Design perfect shadows for your UI elements
box-shadow: 0px 10px 20px 0px rgba(0, 0, 0, 0.2);
Looking for a free CSS box shadow generator online to create professional UI shadows? Our CSS box shadow code generator lets you design custom shadows with live preview and copy-paste code instantly. Perfect for web designers, frontend developers, and anyone building modern websites with clean user interfaces.
Instead of manually writing CSS values and refreshing your browser, this online box shadow maker shows changes in real-time. Adjust horizontal offset, vertical offset, blur radius, spread distance, and shadow color using simple sliders. See exactly how your shadow looks on the preview box before copying the code.
CSS box shadows create visual depth and hierarchy. They lift buttons, cards, modals, and containers off the background, guiding user attention and making your site feel more interactive. A well-designed shadow improves user experience and gives your website a modern, polished look.
Our box shadow CSS generator outputs clean, cross-browser compatible code that works on Chrome, Firefox, Safari, and Edge. No vendor prefixes needed. The generated CSS uses RGBA for transparency control, so shadows blend naturally over any background color or gradient.
Using our free CSS shadow generator is simple. Move the Horizontal slider to push the shadow left or right. The Vertical slider controls up-down position. Increase Blur Radius for softer, more diffused shadows. Use Spread to make the shadow larger or smaller than the element. Pick any hex color to match your brand, and enable Inset for inner shadows that create a pressed effect.
Once you’re happy with the design, click the Copy button to grab the CSS code. Paste it directly into your stylesheet or inline style. You can even layer multiple shadows by adding more box-shadow values separated by commas for advanced 3D effects.
For professional results, keep shadows subtle. Large, dark shadows look outdated. Aim for opacity between 0.15 and 0.3. Gray shadows look cleaner than pure black on white backgrounds. For standard cards and buttons, start with 0px 4px 12px rgba(0,0,0,0.15) and adjust from there.
Match shadow color to your background for a natural blend. On dark themes, use lighter RGBA values. On light themes, stick to gray tones. Combine box shadows with rounded corners and smooth transitions for the best modern UI effect.
Build complete designs faster by combining this tool with our Free CSS Gradient Generator and Online Color Picker Tool. Explore all our free developer utilities at Smart Tools Hub to speed up your workflow.