Atari bitmap image file
File type: Bitmap image file
An IC3 file is a bitmap image file used on Atari ST computers.
It contains image data in a format intended for use with Atari ST image software.
File type category:
Bitmap image file
Date updated: September 27, 2026
The IC3 file extension identifies a legacy Atari ST bitmap image format. The file stores raster image data for display on Atari ST systems.
IC3 files belong to the software and file formats used by Atari ST computers and are not common on current systems. They may require the original Atari ST image software or compatible emulation software.
The format is obsolete and has limited support in modern image applications.
Open an IC3 file with the Atari ST image software that created it, or use compatible Atari ST software in an emulator. Most modern image viewers may not recognize this format.
If compatible Atari ST software can open the file, use its image export or save-as function to create a more widely supported bitmap format.
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