Box Shadow Generator
Create CSS box-shadow effects visually with real-time preview. Adjust offset, blur, spread, and colour to get the perfect shadow effect.
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About Box Shadow Generator
Stop Guessing Your CSS Box Shadows
Every frontend developer has been there. You type out a box-shadow property, refresh the browser, squint at the result, tweak a number, refresh again, and repeat this cycle fifteen times before the shadow looks decent. The box shadow generator eliminates that entire dance by giving you a visual editor where you can see exactly what your shadow looks like as you adjust it in real time.
CSS box-shadow is deceptively powerful. The syntax supports horizontal offset, vertical offset, blur radius, spread radius, color, and the inset keyword - six parameters that interact in ways that aren't always intuitive. A subtle change in blur can completely alter the feel of a component. Bump the spread by a few pixels and your elegant card suddenly looks like it's floating in a weird void. This box shadow generator makes the relationship between those parameters visible and immediate.
What You Can Control
Horizontal and vertical offsets determine where the shadow falls. Positive horizontal pushes it right, positive vertical pushes it down. Most modern designs use small offsets - 0 to 8 pixels - for that subtle lifted look. Larger offsets create a more dramatic, retro effect that's making a comeback in some design trends.
Blur radius is where the magic happens. Zero blur gives you a hard, sharp shadow. Increase it and the edges soften into a natural-looking diffusion. The sweet spot for card shadows is usually between 8 and 24 pixels, but there are no rules - experiment and see what works for your design.
Spread radius expands or contracts the shadow before blurring. A positive spread makes the shadow larger than the element, a negative spread makes it smaller. Negative spread combined with a decent blur creates that gorgeous tight-glow effect you see on premium UI components.
Color and opacity tie it all together. Gone are the days of black shadows at 20% opacity being the only option. Modern designs use coloured shadows - a blue card with a blue-tinted shadow, a purple button with a purple glow. This box shadow generator lets you pick any colour and dial in the opacity precisely.
Multiple Shadows for Layered Depth
Here's something that separates good UI from great UI: layered shadows. CSS lets you stack multiple box-shadow values separated by commas. A common technique is pairing a tight, dark shadow for definition with a larger, softer shadow for ambient depth. The result looks significantly more realistic than a single shadow ever could.
Material Design popularised this approach - their elevation system uses multiple shadow layers to simulate physical depth. But you don't need to follow Google's exact specs. With the box shadow generator, you can experiment with your own combinations and instantly see whether they work.
Real-Time Preview Changes Everything
The visual feedback loop is what makes this tool actually useful rather than just convenient. When you drag a slider and see the shadow update immediately on a preview element, your brain starts building an intuition for how the parameters relate to each other. After a few minutes of playing around, you develop a feel for what blur:16 spread:0 looks like versus blur:8 spread:4 - and that intuition carries over into your regular coding workflow.
Designers who aren't comfortable writing CSS by hand find this tool particularly valuable. Instead of trying to communicate shadow specifications through abstract numbers, they can visually design the exact shadow they want, grab the generated CSS code, and hand it to a developer - or paste it directly into their project.
The Generated Code
Once you've dialled in your perfect shadow, the generator outputs clean CSS that you can copy straight into your stylesheet. No vendor prefixes needed - box-shadow has been supported unprefixed in all major browsers since about 2014. The code you get is production-ready.
For developers building design systems or component libraries, having consistent shadow tokens is essential. Use this box shadow generator to define your elevation scale - small, medium, large shadows - copy the values into your CSS custom properties, and maintain visual consistency across your entire project. It's a small detail that makes a design system feel cohesive.
Whether you're building a portfolio site, styling a SaaS dashboard, or just trying to make a card component look less flat, the box shadow generator takes the guesswork out of one of CSS's most fiddly properties. Adjust, preview, copy, done.