Files with crypt9 file extension can be found as encrypted chat history databases from latest version of WhatsApp Messenger instant messaging client for Android, iOS, BlackBerry and Windows Phone
Software that open crypt9 file
CRYPT9 file extension - WhatsApp Messenger encrypted message database backup
What is crypt9 file? How to open crypt9 files?
File type specification:
The crypt9 file extension is likely only used by certain older versions WhatsApp Messenger, an instant messaging service and client for various mobile platforms.
The crypt9 file stores encrypted and protected database with chat history similar to SQLite database format. This file type seems to have been used briefly, only in particular beta version of Whatsapp.
WhatsApp Messenger also used crypt, crypt5, crypt6, crypt7, crypt8 file extensions for previous versions of its encrypted databases.
By default, the file is called: msgstore.db.crypt9 and is stored on phone SDcard/WhatsApp/Databases folder.
This crypt9 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
Updated: April 6, 2024
The default software associated to open crypt9 file:
Company or developer:
WhatsApp Inc.
WhatsApp is a popular instant messenger available for Android and other smartphones and desktop OS platforms. It uses your mobile data connection or WiFi (when available) to message with friends and family.
WhatsApp Tri-Crypt (Omni-Crypt) 
Company or developer:
EliteAndroidApps
An application for Google Android operating system, which is used to monitor and convert WhatsApp .crypt5, .crypt6, .crypt7 and .crypt8, .crypt9, .crypt10, .crypt11, .crypt12 backup files to .crypt legacy encryption and to .crypt5, .crypt6, .crypt7 and .crypt8, .crypt9, .crypt10, .crypt11, .crypt12 decryption / encryption.
It is available in free and pro paid version.
List of software applications associated to the .crypt9 file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open crypt9 file, edit crypt9 file, convert crypt9 file, view crypt9 file, play crypt9 file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting crypt9 files.
Software that open crypt9 file - WhatsApp Messenger encrypted message database backup
Programs supporting the exension crypt9 on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about WhatsApp Tri-Crypt (Omni-Crypt) for open crypt9 file action.
