Add your files
Drop one CR3 or two hundred. Batch conversion is not a paid feature here.
Files from a recent Canon mirrorless body will not open in older software that still expects CR2.
CR3 wraps Canon's raw data in an ISO base media container rather than the old TIFF-derived structure. The engine parses that container, demosaics the sensor data and writes a JPEG.
CR3 support arrived years after the format did, and some older tools that claim raw support still cannot read it at all. That is a container problem, not a corruption problem; the files are fine, the reader is not.
CR3 needs a newer camera raw module. Canon changed the container completely, so older versions have nothing to parse.
It compresses better and supports Canon's C-RAW mode, which is lossy. The sensor data itself is not fundamentally different.
Drop one CR3 or two hundred. Batch conversion is not a paid feature here.
JPEG Image is lossy, so the quality control decides the trade between size and fidelity.
Converted and deleted the moment it finishes. Never written to permanent storage.