What is the IWM file format?
A file with the .IWM extension is a file known as IWriteMusic. It belongs to the Misc Files category. This format is associated with Kazuo Nakamura.
The reliable way to open a .IWM 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 .IWM 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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