📦 Box Shadow Generator

CSS Box Shadow Generator - Create Beautiful Box Shadows Online

The CSS Box Shadow Generator lets you design and customize box shadows for HTML elements with a live visual preview that updates in real time. Adjust horizontal offset, vertical offset, blur radius, spread radius, color, and opacity, then copy the generated CSS code directly into your project. Create everything from subtle elevation shadows to dramatic glows and inset effects.

What Is CSS Box Shadow?

The CSS box-shadow property adds one or more shadow effects around an element's frame. Shadows are rendered outside the element's border by default, creating the illusion of depth and elevation. The property is one of the most powerful tools in a web designer's toolkit, enabling a wide range of visual effects from subtle material-design-style elevation to dramatic neon glows and pressed-button inset effects.

The box-shadow property accepts multiple shadow layers separated by commas, allowing you to stack shadows for more complex and realistic effects. For example, a realistic card shadow might combine a large, soft ambient shadow with a smaller, sharper directional shadow to simulate natural lighting. This layering technique is used extensively in design systems like Google's Material Design and Apple's Human Interface Guidelines.

The inset keyword changes the shadow from an outer shadow to an inner shadow, which appears inside the element's border. Inset shadows are commonly used to create the appearance of a pressed or recessed element, such as a clicked button or a sunken input field. They can also be used to create inner glow effects and decorative borders.

Key Features

• Horizontal and vertical offset sliders ranging from -50px to +50px for precise shadow positioning.
• Blur radius slider from 0 to 100px — zero creates a hard-edged shadow, higher values create soft, diffused shadows.
• Spread radius slider from -50px to +50px — positive values expand the shadow, negative values shrink it.
• Color picker with hex input for choosing any shadow color, including vibrant colors for glow effects.
• Opacity slider from 0 to 1 for fine-grained control over shadow transparency using rgba values.
• Inset toggle to switch between outer and inner shadow modes for different visual effects.

How to Use the Box Shadow Generator

Creating a custom box shadow with this tool is straightforward and gives you immediate visual feedback.

• Step 1: Use the Horizontal Offset slider to position the shadow left or right. Positive values move the shadow to the right, negative values move it to the left. A value of 0 centers the shadow horizontally.
• Step 2: Use the Vertical Offset slider to position the shadow up or down. Positive values move the shadow down (simulating light from above), negative values move it up.
• Step 3: Adjust the Blur Radius to control the softness of the shadow. A blur of 0 creates a sharp, hard-edged shadow. Higher values create a softer, more diffused shadow that fades gradually.
• Step 4: Use the Spread Radius to expand or contract the shadow. A positive spread makes the shadow larger than the element; a negative spread makes it smaller, which can create a tight, focused shadow effect.
• Step 5: Choose a shadow color using the color picker and adjust the Opacity slider to set the transparency. Click "Copy CSS" to copy the generated code to your clipboard.

Common Use Cases

Box shadows are used throughout modern web design to create depth, hierarchy, and visual interest.

• Card elevation — apply a soft, low-opacity shadow to card components to lift them off the background and create a sense of depth and layering in the UI.
• Button depth — add a subtle shadow to buttons to make them appear three-dimensional and clickable, and use an inset shadow on the active state to simulate a pressed effect.
• Modal and dropdown overlays — use a larger, more prominent shadow on modals, dropdowns, and tooltips to visually separate them from the content behind them.
• Focus indicators — apply a colored box shadow to form inputs on focus to create a visible, accessible focus ring that highlights the active input field.
• Glow effects — use a zero-offset, high-blur shadow with a vibrant color to create a neon glow effect around elements, popular in dark-themed and gaming interfaces.
• Inset effects — use inset shadows on input fields, progress bars, and pressed buttons to create a recessed, sunken appearance that adds tactile depth to the UI.

Tips and Best Practices

For a natural-looking shadow that simulates real-world lighting, use a low opacity (0.1 to 0.3), a moderate blur radius (10 to 30px), and a slight downward vertical offset (5 to 15px). Dark gray or black shadows with low opacity look more realistic than pure black shadows at full opacity. This style is used in Material Design and most modern design systems for card and panel elevation.

When creating a layered shadow effect, combine two or more shadows in your CSS. A common technique is to use a small, sharp shadow for the close shadow (low blur, low offset) and a large, soft shadow for the ambient shadow (high blur, high offset, very low opacity). This combination creates a more realistic and visually rich depth effect than a single shadow alone.

For dark-themed interfaces, consider using colored shadows instead of black shadows. A shadow that matches the element's color at low opacity creates a subtle glow that looks more natural on dark backgrounds than a black shadow. For example, an orange button on a dark background looks better with an orange-tinted shadow than a black shadow.

Why Use the Box Shadow Generator on Webutilbox?

Webutilbox's Box Shadow Generator is fast, free, and requires no account or installation. The live preview gives you immediate visual feedback as you adjust the controls, making it much faster to find the right shadow values than manually editing CSS and refreshing your browser. The rgba color output ensures your shadows have precise opacity control, which is essential for creating natural-looking shadows.

The tool covers all the essential box-shadow parameters in a clean, intuitive interface. Whether you are a beginner learning CSS or an experienced designer looking for a faster workflow, this generator streamlines the process of creating and experimenting with box shadows. The one-click copy button makes it easy to transfer the generated CSS directly into your project without any manual formatting.

Privacy and Security

Your privacy is our priority. All processing happens entirely in your browser using JavaScript. No files, data, or inputs are ever uploaded to any server. Everything stays on your device, making this tool completely safe to use with sensitive content.