BAK files are generally just renamed backup copies of the original file, so if your file was PDF, you can rename it back and open it using PDF Reader.
If that is not possible, the BAK file is not a PDF, and there is no way to convert it. One last option would be to use file analyzer software to determine what kind of .bak file it is and whether it may be exported as a PDF document.
Updated: April 22, 2024
This conversion entry was verified by us and conversion was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it is not possible because incompatibility between programs, caused by closed file formats, very limited support etc.
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