It seems that the latest versions of Omni-Crypt (previously WhatsApp Tri-Crypt) now support .crypt10 and even some newer versions of WhatsApp databases and can revert them back to the basic .crypt files. Once you have the original, you can export the chat history to HTML or similar formats.
Convert WhatsApp Messenger encrypted message database backup to WhatsApp encrypted backup (original).
We found 2 software records in the database related to .crypt10 to .crypt file format conversion.
Articles and other information relating to crypt10 into crypt conversion:
How to convert WhatsApp CRYPT files - Decrypting WhatsApp message databases
Google Android software - convert crypt10 to crypt 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 crypt 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 crypt. 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.
On-line services software - convert crypt10 to crypt on web
Online service for WhatsApp databases