File Surgeon

 

Step 1.

Create a checksum file from your damaged file and send it to someone who has an intact copy.

 
 
 

Step 2.

Create a patch file using the checksum file you were sent and an intact copy of the file it's for.

Checksum file
Original file
 
 
 

Step 3.

Repair a damaged file using the patch file you were sent.

Patch file
Damaged file