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Apple Icon Image format (.icns)
Open and explore Apple ICNS icon files directly in your browser. View all embedded icon sizes, examine file structure, and extract individual images.
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Apple Icon Image format (.icns)ICNS is the native icon format for macOS and iOS. It's a container format that stores multiple icon representations at different sizes and resolutions.
Modern ICNS files include @2x versions for Retina displays, providing crisp icons on high-DPI screens. These are stored with special type codes like ic11, ic12, etc.
A single ICNS file typically contains icons from 16x16 up to 1024x1024 pixels. macOS automatically selects the appropriate size based on context.
Modern ICNS files use PNG or JPEG 2000 compression for larger icons, while smaller sizes may use raw pixel data or run-length encoding.
icp4 (standard), ic11 (@2x Retina, stored as 32×32)
icp5 (standard), ic12 (@2x Retina, stored as 64×64)
icp6 (standard resolution)
ic07 (standard), ic13 (@2x Retina, stored as 256×256)
ic08 (standard), ic14 (@2x Retina, stored as 512×512)
ic09 (standard), ic10 (@2x Retina, stored as 1024×1024)
ICNS (Apple Icon Image) is a file format used by macOS and iOS for application icons. It's a container format that bundles multiple icon sizes and resolutions into a single file, allowing the operating system to display the most appropriate version based on context.
Windows doesn't natively support ICNS files. You can use this online viewer to open and examine ICNS files without installing any software. To use ICNS icons on Windows, you'll need to convert them to ICO format using our ICNS to ICO converter.
Retina icons are high-resolution versions designed for Apple's Retina displays, which have higher pixel density. They're marked as @2x and contain twice the pixels of standard icons. For example, a 16×16@2x icon is actually 32×32 pixels but displayed at 16×16 logical size.
Yes! In the Icons view, each icon has a download button that lets you save it as a PNG file. You can also use the "Extract All" button in the toolbar to download all icons at once.
ICNS files use different compression methods based on icon size. Larger icons (128×128 and above) typically use PNG or JPEG 2000 compression. Smaller icons may use raw ARGB data, run-length encoding, or legacy formats for backward compatibility.
You can create ICNS files using our PNG to ICNS converter. On macOS, you can also use the built-in iconutil command-line tool or applications like Icon Composer. For best results, prepare PNG images at all required sizes (16, 32, 64, 128, 256, 512, and 1024 pixels).