What is the ZRTF file format?
A file with the .ZRTF extension is a file known as Nisus Writer Pro Compressed RTF. This format is associated with Nisus Software, Inc..
The reliable way to open a .ZRTF 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 .ZRTF 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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