What is .JET file extension?
Database file created by the Microsoft Joint Engine Technology (JET) Engine; contains a database structure, which includes tables and fields, and table row database entries in the JET format.
The Microsoft JET Engine is a SQL database engine that was distributed with several different Microsoft applications, including Microsoft Access. However, Microsoft no longer supports JET and has moved to SQL Server. You can still open JET database files by renaming the "jet" file extension to "mdb," which enables the file to be opened by Microsoft Access.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.