You can convert .crypt12 WhatsApp backup files to the original .crypt file using WhatsApp Tri-Crypt / Omni-Crypt app, but you cannot convert it to any of the previously used version, including crypt6. Once you have the .crypt file, you can extract the messages with other tools.
Convert WhatsApp Messenger message database to WhatsApp Messenger encrypted message database backup file.
We found one software available in the database for this conversion.
Google Android software - convert crypt12 to crypt6 on Android
Android app used to decrypt and convert CRYPT files
Convert from crypt12 file format
|Yes, WhatsApp Tri-Crypt (Omni-Crypt) supports crypt12 file conversion as a source file type.||Yes||No||No||No||No||No||No|
|Yes, WhatsApp Tri-Crypt (Omni-Crypt) supports crypt6 file conversion as a target file type.||Yes||No||No||No||No||No||No|
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.