Box Shadow Generator
Box Shadow Generator is a free, visual CSS tool that helps you create beautiful box shadows for your web elements without writing code manually. Whether you need a subtle drop shadow for a card component, an intense glow effect for a CTA button, or multiple layered shadows for a dramatic 3D effect, this generator gives you complete control over every shadow parameter. Adjust the horizontal and vertical offset, blur radius, spread radius, color, and opacity with intuitive sliders and color pickers. Toggle between inset and outset shadows. Add multiple shadow layers and see the result in real-time on a live preview element. The tool outputs clean, cross-browser CSS code ready to copy and paste into your stylesheet.
What Is
The CSS box-shadow property adds shadow effects around an element's frame. A box shadow can be described by X and Y offsets relative to the element, blur and spread radius, color, and whether the shadow appears inside or outside the element. The box-shadow syntax: box-shadow: offset-x offset-y blur-radius spread-radius color inset; Understanding each parameter: - offset-x: Horizontal distance of the shadow from the element. Positive values move right, negative values move left. - offset-y: Vertical distance. Positive values move down, negative values move up. - blur-radius: How blurry the shadow edge is. 0 means a sharp edge, higher values create softer shadows. This cannot be negative. - spread-radius: Expands or contracts the shadow size. Positive values make the shadow larger than the element, negative values make it smaller. - color: Any CSS color value (hex, rgb, rgba, hsl, named colors). Using rgba with alpha transparency creates realistic shadows. - inset (optional): When present, the shadow is drawn inside the element instead of outside. Why use box-shadow in web design: - Depth and elevation: Shadows create visual hierarchy by making elements appear to float above the surface - Material design compliance: Google's Material Design system uses shadow depth to indicate component hierarchy - Focus and hover states: Shadows provide visual feedback on interactive elements - Aesthetic polish: Even subtle shadows make interfaces look more refined and professional - Card differentiation: Shadows help separate cards from backgrounds in card-based layouts The generator supports multiple shadow layers (comma-separated), allowing you to stack multiple shadow effects on a single element for more realistic or dramatic results.
How to Use
- Enable or disable individual shadow layers using the checkboxes. Start with one shadow layer and add more as needed by clicking the 'Add Shadow' button. Each layer can be independently configured.
- Adjust the horizontal offset (offset-x) using the slider. Positive values shift the shadow to the right of the element, negative values to the left. Watch the preview update in real-time as you drag.
- Set the vertical offset (offset-y) to control how far above or below the element the shadow appears. Positive values move the shadow downward, simulating a light source from above.
- Increase the blur radius for softer, more diffuse shadows. A value of 0 produces a sharp-edged shadow; values between 5-20px create natural-looking shadows for most UI elements. Very high values (30px+) create glow-like effects.
- Fine-tune the spread radius to expand or shrink the shadow. Negative values can tighten the shadow around the element, useful for creating crisp edge effects. Positive values make the shadow larger than the element itself.
- Pick your shadow color using the color picker. Enable the opacity slider to adjust transparency — realistic shadows typically use rgba(0, 0, 0, 0.1-0.3). Try different colors for creative glow effects (e.g., blue glow for neon buttons).
- Toggle the 'Inset' checkbox to switch between outer and outer shadows. Inset shadows are drawn inside the element, creating a pressed or recessed appearance useful for form inputs and depressed buttons.
- Copy the generated CSS code from the output panel with a single click. The code includes all vendor prefixes for cross-browser compatibility. Paste it directly into your stylesheet or inline style attribute.
Examples
Input: X:0 Y:4px Blur:12px Spread:0 Color:rgba(0,0,0,0.15)
Process: Combine offset + blur + color → CSS box-shadow syntax
Result: box-shadow: 0 4px 12px 0 rgba(0,0,0,0.15);
Input: X:2px Y:2px Blur:8px Spread:-2px Color:#3b82f6
Process: Multi-shadow layering → Offset calculation
Result: box-shadow: 2px 2px 8px -2px #3b82f6;
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Frequently Asked Questions
What is the difference between box-shadow and text-shadow?
box-shadow applies to block-level elements (divs, sections, cards, buttons) creating shadows around the rectangular box of the element. text-shadow applies to text content within an element, creating shadows behind the actual letter shapes. They use similar syntax (offset-x, offset-y, blur, color) but box-shadow has additional features like spread-radius and inset keywords.
Can I create multiple shadows on one element?
Yes! Multiple box shadows are defined by comma-separating shadow values. The tool supports unlimited shadow layers. Multiple shadows allow for more realistic effects — for example, combining a tight dark shadow for immediate depth with a softer, larger shadow for ambient shadowing. Order matters: the first shadow in the list appears on top, with subsequent shadows layered behind it.
What color should I use for realistic shadows?
For the most realistic results, use a dark version of your background color with low opacity. Pure black at 15-25% opacity (rgba(0,0,0,0.15-0.25)) works well on light backgrounds. On colored backgrounds, use a darker shade of the background color. Avoid fully opaque shadows — they look unnatural. For colored glow effects, use bright colors at 30-60% opacity.
Is box-shadow supported in all browsers?
Yes, box-shadow has excellent browser support. It works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera without vendor prefixes. For very old browsers (IE 8 and below), box-shadow is not supported, but those browsers have negligible market share today. The generated CSS includes -webkit- prefix for maximum compatibility.
How do I create a Material Design-style shadow?
Material Design uses specific shadow values for different elevation levels. Common values: Level 1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24). Level 2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23). Level 3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23). Layering two shadows per level (one tighter, one diffuse) creates the characteristic Material Design depth effect.