This article explains what an MDT file is, depending on the format your file is saved in, and how you can open an MDT file on your computer or convert it to another format (if applicable).

A file with the file extension .MDT is a data file used by Microsoft Access and its add-ins to store relevant data.

Although Access uses both file types, an MDT file should not be confused with an MDB file, which Access uses to store database information. Unless your particular MDT file happens to be an old Microsoft Access 97 template file.

An MDT file can instead be a GeoMedia Access database template, a format used by the GeoMedia geospatial processing software to create an MDB file from the data.