Convert JPG and JPEG images into professional macOS ICNS icon files. Perfect for app icons, Finder icons, and custom folder icons on Mac. Have a PNG instead? Try our PNG to ICNS converter. Need Windows icons? Use our PNG to ICO converter or explore the ICNS Viewer to inspect existing icons.
ICNS is the native icon format for macOS. It contains multiple sizes in a single file, allowing macOS to choose the best size for each context.
ICNS files bundle icons from 16x16 up to 1024x1024, supporting both standard and Retina displays automatically.
Required for macOS app submissions to the App Store. Xcode uses ICNS files for app icons.
Use ICNS files to customize folder icons in Finder. Simply copy the icon and paste it onto any folder.
Use a 1024x1024 or larger JPG for best results. The converter will create crisp icons at all smaller sizes.
JPG doesn't support transparency natively. Use "Remove White Background" to add transparency for professional-looking icons.
For best results, start with a square image. Enable "Smart Crop" to automatically center and crop non-square images.
Enable "Big Sur Rounded Corners" for the modern macOS look with smooth, rounded icon edges.
Smallest size, used in Finder list view and window title bars.
Finder column view, preference panes, and small dock icons.
Standard Finder icon view. Most commonly seen size.
Cover Flow view and larger Finder displays.
Full-size Quick Look previews and maximum non-Retina quality.
Retina displays (@2x). Required for crisp icons on modern Macs.
ICNS is Apple's icon format for macOS, while ICO is Microsoft's format for Windows. ICNS supports larger sizes (up to 1024px) and is required for Mac apps. Use PNG to ICO if you need Windows icons.
Yes! While JPG doesn't support transparency, our converter can remove white backgrounds and add transparency. Enable "Remove White Background" or "Add Transparency Support" in the options. For images already with transparency, consider using our PNG to ICNS converter instead.
For app development, include all sizes (16, 32, 128, 256, 512, 1024). For personal use, the "Standard Mac" preset (16, 32, 128, 256, 512) is sufficient. Add 1024x1024 for Retina display support.
Open the ICNS file in Preview, press Cmd+A to select all, then Cmd+C to copy. Right-click any folder or app, choose "Get Info", click the icon at the top left, and press Cmd+V to paste your custom icon.
You have two options: enable "Smart Crop to Square" to automatically crop to center, or enable "Preserve Aspect Ratio" to add padding around non-square images while maintaining proportions.
PNG is preferred if you need transparency or have vector-like graphics. JPG is suitable for photo-based icons or when file size is a concern. Both formats work well, but PNG provides better quality for icons with sharp edges or text.