BD-J Object

A BD-J Object, unlike an Movie Object, is not an object file, but a table of Java applications or command programs (Xlets), that trigger Playlist playback, other Movie/BD-J Objects, and Java programs.

BD-J Object
Type of format Data format
First released 2006
Developer Blu-ray Disc Association
Filename extension xxxxx.bdjo
Limits 1,001 Objects allowed
Open Format? Yes
Free Format? ?
Magic Number BDJO0100BDJO0200 (BD) BDJO0300 (UHD-BD)
Its magic numbers are BDJO0100 and BDJO0200. For Ultra HD Blu-ray, its magic numbers are BDJO0300.








Author(s) : Æ Firestone - Last Updated: 4/22/2026

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