How to Open an MDT File
Microsoft Access opens files that are in the MDT format.
If your MDT file isn’t a Microsoft Access Data file, then it’s most likely used by Hexagon’s GeoMedia Smart Client.
A simple text editor should be able to open MDT files that are produced from video converters or video editors.
See our Best Free Text Editors list for some good options for viewing these types of MDT text files.
Tips: If your MDT is associated with a Panasonic camera and it’s corrupted and not able to be used normally, see this YouTube video on how to repair the MDT file with the Grau Video Repair Tool.
Note: A text editor might be useful even if your MDT isn’t saved in any of these formats. Just open the file there and see if there’s any header information or readable text anywhere throughout the file that indicates what program was used to create it. This can help you research software that supports opening that specific file.
If you find that an application on your PC does try to open the MDT but it’s the wrong application or if you would rather have another installed program open them,
see our How to Change the Default Program for a Specific File Extension guide for making that change in Windows.