CSS Box Shadow Generator
Build multi-layer CSS box shadows visually with live preview. Adjust offsets, blur, spread, color, and opacity — then copy the ready-to-use CSS value.
CSS Box Shadow Generator
Live Preview
CSS Output
box-shadow: 4px 4px 12px 0px rgba(0, 0, 0, 0.20);What is CSS box-shadow?
The CSS box-shadow property adds one or more shadow effects to an element's frame. Each shadow is defined by its horizontal and vertical offset, blur radius, spread radius, color, and an optional inset keyword that moves the shadow inside the element.
Multi-layer shadows
You can stack multiple shadow layers to achieve depth effects, glow effects, or simulated borders. Layers are rendered back-to-front, so the first shadow in the list appears on top.
Why use CSS Box Shadow Generator online?
CSS Box Shadow Generator in the browser saves context switching: no CLI install, no fragile one-liners, and instant feedback for teammates who do not live in the terminal. It is ideal for debugging, demos, and quick checks during code review.
Tips for best results
Work with a sample payload first, then paste production data. Keep privacy in mind: prefer local browser processing for secrets, tokens, and customer data. Bookmark this page for faster access next time.
How to use
- Click 'Add Shadow' to create a shadow layer.
- Adjust the offset, blur, spread, color, and opacity sliders.
- Toggle 'Inset' to create an inner shadow.
- Add more layers to build complex effects.
- Copy the value or full declaration to your clipboard.
- Review the output and use Copy to paste into your editor, ticket, or chat.
- Need another utility? Scroll to Related Tools below for CSS Box Shadow Generator companions on skybin.io.
- For a deeper walkthrough, read the linked Skybin blog article at the bottom of this page.
Online tool vs terminal
| Terminal / CLI | This tool |
|---|---|
| Install CLI tools or write a one-off script | Open the tool in your browser — no install |
| Look up flags in man pages or Stack Overflow | Paste input or upload files where supported |
| Repeat for each file format or edge case | Get instant visual feedback and copy buttons |
Your data stays in your browser — no data is sent to any server.
Frequently Asked Questions
- What does CSS Box Shadow Generator do?
- Build multi-layer CSS box shadows visually with live preview. Adjust offsets, blur, spread, color, and opacity — then copy the ready-to-use CSS value.
- What is the difference between blur and spread?
- Blur radius controls how soft the shadow edges are — a higher value creates a more diffuse shadow. Spread radius expands or shrinks the shadow size beyond the element's bounding box, without affecting softness.
- What does the inset keyword do?
- Inset moves the shadow inside the element rather than outside. This is useful for creating pressed or recessed UI effects.
- Can I use multiple shadows?
- Yes. CSS box-shadow accepts a comma-separated list of shadow definitions. Each layer is independent and they are composited back-to-front.
- Is the output cross-browser compatible?
- The box-shadow property is fully supported in all modern browsers without vendor prefixes. No -webkit- or -moz- prefix is needed.
- Is this tool free to use?
- Yes. All Skybin developer tools are free with no account, API key, or usage limits.
- Does my data get sent to a server?
- No. Processing runs in your browser whenever possible. Sensitive input never leaves your device unless a tool explicitly fetches a URL you provide (e.g. OG Validator).
- Can I use this on mobile?
- Yes. The tools work in modern mobile browsers, though a desktop screen is easier for large JSON or PDF workflows.
- How is this different from desktop apps?
- There is nothing to install or update. Open a bookmarked URL and start working — ideal for quick tasks during development or support calls.
- Are there keyboard shortcuts?
- Most tools support standard paste (Ctrl+V / Cmd+V) and select-all in text areas. Copy buttons provide one-click output.
- Does Skybin store my history?
- No. We do not log tool inputs or outputs. Refreshing the page clears in-memory state unless the tool encodes state in the URL.