StoryMill project file
File type: Miscellaneous file
A .storymill file is a project file created by StoryMill, a writing application for Apple macOS.
It stores a StoryMill writing project rather than a standalone document.
File type category:
Miscellaneous file
Date updated: September 24, 2026
StoryMill is novel-writing software from Storyist. A .storymill file saves a project created in the application.
The file can contain the manuscript and related project information, including the organization of the work and associated writing notes. It is intended to be used as a complete StoryMill project file.
The format is associated with StoryMill for Mac OS X and macOS. It is a proprietary project format rather than a general document-exchange format.
Open a .storymill file with StoryMill on Apple macOS. Use StoryMill's Open command and select the file, or open the file from Finder if StoryMill is installed.
A general text editor or word processor will not properly interpret the project file and may display unusable data.
Open the project in StoryMill and use its built-in export or print options to create a document in a format supported by the installed version.
Software applications that can open storymill files:
Apple macOS / Mac OS X
Software applications that can edit storymill files:
Apple macOS / Mac OS X
Software capable of saving storymill files:
Apple macOS / Mac OS X
Software apps that create storymill files:
Apple macOS / Mac OS X
Language
