Temporary file
File type: Temporary file
A .tmt file is a temporary file created and used by an application while it performs a task.
It may contain intermediate or working data and is generally intended for the application that created it rather than for direct user access.
Found 2 different file type records with the same tmt filename suffix.
File type category:
Temporary file
Date updated: October 23, 2026
The .tmt file extension is used for temporary files. A program may create such a file when it cannot keep all the data required for a task in memory, when it is processing data larger than it can handle directly, or when it needs a simple way to exchange data between processes.
The contents and structure depend on the application that created the file. Temporary files are normally part of an application's internal workflow and are not intended to be long-term documents. They may become unnecessary when the application finishes, although a file can remain if the program closes unexpectedly or does not remove it.
Temporary files are typically managed by the application that created them and cannot be opened meaningfully by themselves. If the file is still in use, do not move or delete it.
If it must be inspected, a text editor may display the contents when the file contains plain text, but many temporary files contain application-specific or binary data and will not be readable.
A .tmt file is not normally a document format and cannot usually be converted usefully. If it contains data that needs to be kept, use the application that created it to open the related project or source file and export the data in a supported format.
File type category:
Document file
Date updated: September 9, 2019
The tmt file extension is related to the TimeCult, a time tracking and time management software for Microsoft Windows and Linux operating systems.
The tmt file stores project from TimeCult.
Use TimeCult to open *.tmt files.
Probably can be exported to other formats.
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