When you asks if it is possible to repair corrupt photos with HxD, HxD is mainly a hex editor, which is good for investigating or altering binary file content, but fixing the photo in this way involves knowing how files should be structured. Improper alteration of the JPEG headers or photo data might lead to additional corruption. It is recommended to make copies of the original photo before working with it via a hex editor and edit a copy rather than the original itself. Having a valid photo from the same device can help when comparing the file headers, yet there is no guarantee that it will help fix the photo in question. If one prefers an easier solution, Notchox can be used for photo recovery.