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Convert icns to j2c

  1. Download and install the latest version of Filestar.

  2. Right click on one or more Icns file(s) on your desktop and select Convert with Filestar.

  3. Type convert to j2c in the search box.

  4. Press Convert.

What is the difference between .icns and .j2c?

Name
macOS Icon Resource File
JPEG 2000 Code Stream
Extension
.icns
.j2c
Format
Binary
Binary
Category
Developer
Raster Image
Developer
Apple
Joint Photographic Experts Group
Description
It is an icon image file used to show application icons in the macOS Finder and macOS dock. It contains one or several .PNG images and it supports 1bit and 8-bit alpha channels.
The JPEG 2000 Code Stream (j2c) file format is a type of image file format that is part of the JPEG 2000 family of image standards. This format is specifically designed for encoding images in a highly efficient manner, allowing for both lossless (exact reproduction) and lossy (approximate) compression. The j2c format focuses on the core coding stream of JPEG 2000 images, representing the encoded image data without additional metadata or structure.
MIME Type
image/x-icns
image/jp2
Sample
sample.j2c
Wikipedia
.icns on Wikipedia
.j2c on Wikipedia

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