.C4 File

The c4 file extension is related to JEDMICS image format, also known as C4, was developed by Image Machines Corporation of Herndon, VA.

It is very similar in structure to Aldus Corporation’s TIFF 6.0 tiled file format and Image Machine Corporation’s TG4 file format.

These three file formats differ only in the structure of the header and tile indices. All three file types use CCITT Group 4 encoding and the structure of the compressed tiles is the same for all three.

This c4 file type entry was marked as obsolete and no longer supported file format.

This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.

Files with c4 file extension can be mostly found as bitmap images in special JEDMICS format.

How to open:

You can view this type of pictures in Xnview or similar program.

How to convert:

Various bitmap formats can be usually converted between each other, provided you will find a tool that support this particular file type.