You can convert .crypt10 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 crypt9. Once you have the .crypt file, you can extract the messages with other tools.
Convert WhatsApp Messenger encrypted message database backup to WhatsApp Messenger encrypted message database backup.
We found 2 software records in the database related to .crypt10 to .crypt9 file format conversion.
Google Android software - convert crypt10 to crypt9 on Android
Android app used to decrypt and convert CRYPT files
Convert from crypt10 file format
|Yes, WhatsApp Tri-Crypt (Omni-Crypt) supports crypt10 file conversion as a source file type.||Yes||No||No||No||No||No||No|
|Yes, WhatsApp Tri-Crypt (Omni-Crypt) supports crypt9 file conversion as a target file type.||Yes||No||No||No||No||No||No|
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned crypt10 to crypt9. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
WhatsApp crypt tool for Android