.DB3 File

File extension db3 is associated with the SQLite relational database management system as well as other database systems, such as dBase III and has been often used on Palm Pre smart phone to store contacts, call logs, etc.

db3 database file is stored in simple text format and contains structure of database and database entries. It is viewable in any text editors or word processors. 

DB3 is not default file extension for SQLite databases, SQLite uses .sqlite file extension.

Files with db3 extension are database files in one of the older  SQLite database file format. DB3 database is stored in simple text format and contains structure of database and database entries. As such it can be viewed using any text editor.

How to open:

Use Navicat or any text editor to view content of DB3 database files.

How to convert:

Much like any other database, even *.db3 files can be exported to other database formats, or data formats like CSV.