: While primarily for creating EPUBs, it is useful if you are working with Word documents that need to be text-accessible. Python Scripting (For Developers)

: A reliable option that handles many file formats and preserves basic text structure.

If you want a fast, one-time conversion without installing software, several free web-based tools can handle this: : Supports direct conversion from EPUB to TXT .

If the file is protected by DRM (Digital Rights Management) , these tools will not be able to read or convert the content without first removing the protection through authorized means. Getting started with WordToEPUB - The DAISY Consortium

: The industry standard for ebook management. You can use its "Convert books" feature to output as a .txt file.