We've tested this exact camera against a real CR2 sample file and independently verified the shutter count against exiftool — this one is confirmed working.

Shutter count for the Canon EOS-1D Mark II is read from MakerNote tag 0x0093 (FileInfo) in the camera's CR2 file metadata — entirely in your browser, the file is never uploaded anywhere.

Check your EOS-1D Mark II shutter count →