.MDB File Extension

Microsoft Access Database

Developer Microsoft
3.7  |  167 Votes

What is an MDB file?

An MDB file is a database file created by Microsoft Access, a widely-used desktop relational database program. It contains the database structure (tables and fields) and database entries (table rows). MDB files may also store data entry forms, queries, stored procedures, reports, and database security settings.

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Screenshot of a .mdb file in Microsoft Access 2016
MDB file open in Microsoft Access 2016

Access provides visual tools for creating and populating databases. The software includes workflow tools for making online database-driven web applications that you can publish to an Office 365 site or Microsoft SharePoint server. Access is included with some Microsoft Office software packages, but it is available only for Windows.

How do I convert MDB files to ACCDB files?

You can export MDB files to the newer .ACCDB file format by simply clicking File → Save As → Save Database As, choosing the Access file type, and then clicking Save As.

How to open an MDB file

You can open an MDB file in Microsoft Access (Windows). You can also import MDB files into other programs that use databases, such as Microsoft Visual Studio (Windows) and Wolfram Research Mathematica (cross-platform).

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Programs that open MDB files

Avid Media Database

Developer Avid Technology
2.6  |  23 Votes

Database file used by several different Avid video editing and finishing software products; contains indexed information about the media assets used by a video editing project; used as a cache that tracks the resources with up-to-date information.

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MDB files are generated automatically by the software in the folders where media assets reside. If they are deleted, the software rebuilds them.

Programs that open or reference MDB files


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