Hi I wrote a little tool to display WhatsApp messenges on PC. I was only able to test it against a very small database file, but you can try if this one works for you.
After opening a database, the decrypted file is located at your temp directory (C:\Users\xxx\AppData\Local\Temp\WAV?????.tmp) until the program is terminated.
(I am not allowed to post links yet, replace hxxps with https please)
How to use:
1. Download msgstore.db.crypt5 from your Android phone (located at /sdcard/WhatsApp/Databases)
2. Open WhatsApp Viewer
3. File -> Open -> Select file
4. Enter account name. This must be the same Google account name used on your phone. If you have more than one account, try the first one. Make sure you enter the whole email address as account name. If you have trouble, sometimes leaving the account name empty is known to work.
5. Click on a chat to show the messages.
Currently only text and image messages are supported (no audio, gps).
You cannot see bigger images because only thumbnails are stored in the database.
You see cryptic phone numbers because account names or details are not stored in the database (no support for wa.db yet).
This release is not stable and known to crash sometimes. Sorry.
The viewer worked for the files with .crypt5 But recent updates later than .105 of Whatsapp are creating another encrypted backup file with .crypt6, The above viewer could not decrypt it