What is the M13 file format?
A file with the .M13 extension is a file known as Microsoft Media Viewer. This format is associated with Microsoft Corporation.
The reliable way to open a .M13 file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .M13 files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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