How to Convert Multiple CR3 Images to GBR?
1. Download and Install reaConverter
reaConverter is a standalone Windows app — download, install, and start converting CR3 files in under two minutes. You can also resize, crop, and adjust images during conversion.
2. Load your CR3 files
Start reaConverter and add your .cr3 files. The software processes everything locally, so your files never leave your computer.
Add files by dragging them in, browsing folders, or using the right-click menu from Windows Explorer.
3. Select GBR as output format
Choose GBR as the target format. Pick a destination folder or let reaConverter save files alongside the originals.
4. Start CR3 to GBR conversion
Then simply press the Convert button and your conversion will begin in no time!
Once the conversion is complete, you can find your GBR files in the destination folder you selected.
How CR3 and GBR differ in practice
CR3 files hold unprocessed sensor data, so white balance and exposure are still adjustable. Converting to GBR bakes those decisions into the pixels, and highlight recovery is no longer available afterwards. Set white balance and exposure before the run rather than after. CR3 is made of pixels and GBR is a geometry format, so the two describe images in fundamentally different ways. Check the result before sending it downstream: what matters is whether the output contains editable geometry or a picture placed inside a GBR container, and that determines whether a CAD or design tool can work with it.
