.0-R File

The 0-r file extension is reported to have been used for a PNG-like file format. Might be just renamed file extension used in some old program. No further information about 0-r file type could be found.

How to open:

You might be able to open and view this file type using XnView.

How to convert:

You can convert *.0-r files pretty much like any other PNG graphics file.