.REJ File

The rej file extension is mainly related to Mercurial revision control tool for software developers.

These rej files are so called rejects - pieces of a patch that didn't apply cleanly. Seems like source codes.

How to open:

You can view or edit these files using any text editor.

How to convert:

As far as we know, this .rej file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.