Home : File Types : ICNS File

.ICNS File Extension

File TypeMac OS X Icon Resource File

DeveloperApple
Popularity
4.4 (31 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategorySystem Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

What is a ICNS file?

An ICNS file is an icon file used by Mac OS X applications. It stores one or more images, typically which were originally .PNG files and supports 1-bit and 8-bit alpha channels. ICNS files are used for displaying the application icon in the Mac OS X Finder and in the OS X dock.

More Information

ICNS files are generally located within the Contents/Resources/ directory inside the application package. They are also referenced by the application's .PLIST file (Info.plist) using the CFBundleIconFile property.

Mac OS X icon files can be viewed with the Apple Preview program included with Mac OS X. They can also be created using Icon Composer, another utility included with Mac OS X. ICNS files support icon images of 16x16, 32x32, 48x48, 128x128, 256x256, and 512x512 pixels, as well as 1024x1024 pixels as of Mac OS X 10.8 Mountain Lion.

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Programs that open ICNS files
Windows
Axialis IconWorkshop
Inkscape
XnViewMP
Microsoft Windows Explorer
with the XnShell extension
Mac
Apple Preview
Icon Machine
Iconographer
Folder Icon X
Inkscape
Snap Converter
Adobe Photoshop with IconBuilder for Macintosh plugin
XnViewMP
Linux
Inkscape
XnViewMP
Updated 8/24/2016

.ICNS Extension Information

This page contains information about the file extension ICNS and its known file associations. Our goal is to help you understand what a *.icns file is and how to open it.

The Mac OS X Icon Resource file type, file format description, and programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and do not publish any information we have not verified.

If you would like to suggest any additions or updates to this page, please let us know.