.NDX File Extension

Index file that defines the structure and fields of a database; consists of a header followed by a B-tree, which contains a root, branch, and leaf nodes; used primarily by dBASE, but may be recognized by other database programs.

Archive file created by Neat 5, a digital document organizer; contains an exported copy of a Neat folder of documents or single document, such as a receipt or recipe, that can be shared between Neat users.

An NDX file may also be a drawing created by Nevron Software MyDraw, an application for creating various diagrams and technical illustrations. It stores text, shapes, lines, and other objects arranged together on a free-form canvas. NDX files are similar to MyDraw .NDB drawings but are saved in XML format instead of binary format.