How to Convert Multiple CDR Files to FITS?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting CDR files in under two minutes.
2. Load your CDR files
Launch reaConverter and load the CDR files you want to convert. Add a few files or thousands, batch processing handles them all.
Drag-and-drop CDRs directly into reaConverter or use the folder browser to load entire directories.

3. Select FITS as output format
Select FITS as target format and pick where to save results. You can keep default settings or fine-tune the output.

4. Start CDR to FITS conversion
Press Convert to begin processing. You can watch the progress or minimize and let it run in the background.

Your converted FITS files will appear in the destination folder as soon as processing completes.
CDR to FITS: what carries over and what does not
CDR describes geometry rather than pixels, so it has no inherent resolution. The conversion renders it at whatever size you choose, and that choice is final: enlarging the FITS afterwards will not recover the sharpness. Set the output dimensions or DPI before converting, not after.








