Before the Canon raw .cr2 files repairing, here are some other ways easier that may work for you to open the .cr2 files if these .cr2 files were from a recent deletion, reformatting or other data loss.
CR2 FILE VIEWER: Open your .cr2 raw images with the right .cr2 file opener/viewer: PhotoShop(the newest PhotoShop supports the cameraraw that can open the .cr2 file, or you need to download the add-on cameraraw for Photoshop)
Also read: Why my cr2 file not opening
if your cr2 image is not opening, and if it was restored from a recent deletion, we would recommend you restore the .cr2 file with free tool iCare Data Recovery Free to find its complete file.
Note: This would often work if your recovered cr2 image is not opening from other recovery tools, especially some tools that are free however weak since iCare Recovery Free has advanced file recovery mode that could retrieve cr2 images.
Also read: recovered cr2 files not opening, or how to recover cr2 image from Canon sd card
Some other recovery tools that you may consider if the above free tool did not work for you.
Video - how to recover files with Winhex
Here are some convert tools online that you may consider for getting your cr2 image work in another way by converting them into another file format such as jpg, png etc.
Reinsert sd card to Canon camera after batter recharged.
Sometimes the .cr2 raw image could be automatically repaired once you reinsert the sd card back to the camera slot once you insert the recharged battery to the Canon camera if the .cr2 is not opening due to a low power of battery or automatically shutting down.
Materials required:
Hxd download url: https://mh-nexus.de/downloads/HxDPortableSetup.zip
More product information can be found on this page https://mh-nexus.de/en/hxd/
Note: This tool needs some professional skills and it would be complicated to understand for non tech professionals. It's the best that you watch the video several times and find a tech pro who can do the repair job for you.
ExifTool is free .cr2 file edit tool that you may try to open the file to see whether it can help restore the .cr2 image to the correct file.
Source: https://exiftool.org/
A commercial utility that you may try to see whether it could help restore your .cr2 image when it was corrupted or damaged due to unknown causes.
Note: This tool offers easy to manage user interface for damaged cr2 file repairing. You may test whether it could help before the purchase. Free trial is available.
None of them works? If none of the above works, here are some situations that you need to understand.
Under such circumstances, it's a matter of fact that the cr2 images are corrupted that can no longer be repaired.
Winhex would be a nice choice however it is not user-friendly for non-geeks. Some professional may help you with the Winhex for the .cr2 file recovery. Or you may ask some local repair center for help and it usually takes over $200 to $2000 or even more.
Question: Would sfc / scannow work for cr2 recovery on sd card?
Answer: SFC/SCANNOW is for damaged sd card bad blocks repairing which will not repair the damaged .cr2 file images.
Here are some cr2 file reader that you may use it to open your cr2 raw images.
Also read: how to open cr2 file
Step 1. Switch the camera's power to ON.
Step 2. Press MENU button > Press Q button > Choose triangle icon tab.
Step 3. Turn the dial to choose the three dots tab.
Step 4. Turn the dial to choose RAW image processing > Press SET
Step 5. Turn the dial to select the image > Press SET
Step 6. Process and save the image.
Source: https://support.usa.canon.com/kb/index?page=content&id=ART142755
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