There is no way how you could convert one digital RAW from one vendor to another, in this case Canon CR2 to Nikon NEF. The best course of action is to export it to some universal format like DGN with which you can work in almost any profesional digital photo editing and management software. This is useful when you have photos from your old camera but only software for your new camera from different vendor.
Convert Canon digital camera RAW image format version 2.0 to Nikon Digital SLR camera RAW image.
We found 10 software records in the database related to .cr2 to .nef file format conversion.
Microsoft Windows software - convert cr2 to nef on Windows
Adobe's professional tools for RAW image management and post-production
Convert from cr2 file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned cr2 to nef. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Program used to manage pictures and photos
One of the best bitmap graphic editing program
A digital photo managing and editing application
Fast and inexpensive app for creating impressive landscape images
A complete image retouching program
Photo Manager is digital photo editor and manager for Windows
Apple macOS / Mac OS X software - convert cr2 to nef on OS X
Mac version of Adobe' professional digital photo editing tools
Mac version of popular digital image editor
Linux/Unix software - convert cr2 to nef on Linux
A digital photo editing and converting software for Linux