What is a ICNS file?
ICNS (Apple Icon Image) is the icon container used by macOS apps, with several sizes up to 1024x1024 in one file. It was introduced in 2001 by Apple.
What ICNS is good at
- Native macOS app icon format
- Stores many sizes
- Supports transparency and Retina sizes
Where ICNS falls short
- Only useful for icons
- Limited outside macOS
When to use ICNS
- MacOS app icons
- Electron and Tauri builds
- Custom folder icons
Where ICNS files open
ICNS files open in macOS, Preview, Xcode and icon tools.
ICNS compared with PNG
ICNS or PNG? ICNS is best for macOS app icons. PNG is best for screenshots and UI graphics. Convert ICNS to PNG or convert PNG to ICNS.
Frequently asked questions
What is a ICNS file?
ICNS (Apple Icon Image) is the icon container used by macOS apps, with several sizes up to 1024x1024 in one file. It was introduced in 2001 by Apple.
What are the advantages of ICNS?
Native macos app icon format; stores many sizes; supports transparency and retina sizes.
What are the drawbacks of ICNS?
Only useful for icons; limited outside macos.
What programs open ICNS files?
ICNS files open in macOS, Preview, Xcode and icon tools.
How do I convert a ICNS file?
Choose the ICNS converter you need from the list on this page, drop in your file and press Convert. You get your new file in seconds, free and without sign-up.