What is a db3 file and how do I open a db3 file?
DB3 is a database file created by SQLite, a lightweight, self-contained database program that creates databases using plain files. It contains the database structure as well as data records; used for storing and retrieving structured data using SQL. During transactions, SQLite stores additional information in a second file called "rollback journal", or if SQLite is in WAL mode, a write-ahead log file. If the application or host computer crashes before the transaction completes, then the rollback journal or write-ahead log contains information needed to restore the main database file to a consistent state. When a write-ahead log or rollback journal contains information necessary in recovering the state of the database, they are called a "hot journal" or "hot WAL file".
SQLite Viewer gives users the ability to browse the information from all SQLite variant .DB, .DB3, SQLite, SQLite3 so as long as you have the file the SQLite Browser will let you view all the information underneath the Database in semantic and systematic way.
Relevant db3 file links:
How to open db3 file on YoutubeHow to open db3 file on Wikipedia
How to open db3 file on Microsoft.com