The db4o Object Manager is a GUI tool to browse and query the contents of any db4o database file. Object Manager currently provides the following features:
Powerful ad-hoc queries
Efficient handling of large data sets
Table view for quick scrolling through large data sets
Tree view for drilling down through an object graph
Access to internal database information including stored classes, data size and indexes
Management functions including Backup and Defragment
Online version of this document can be found on the developer website.