Word can open a WPD file, just fine. If you change the extension to doc, it'll load in. Which also means you can open it in LibreOffice, or use Pandoc or whatever else you would usually reach for. [1]
WordPerfect's format is a subset of Word's original.
Though, if you want to nerdsnipe yourself, the format is also documented [2], and there's a few libraries here and there for parsing it.
[1] Well, almost. The Mac-versions of WordPerfect aren't a subset of Word. See the spec docs.
WordPerfect's format is a subset of Word's original.
Though, if you want to nerdsnipe yourself, the format is also documented [2], and there's a few libraries here and there for parsing it.
[1] Well, almost. The Mac-versions of WordPerfect aren't a subset of Word. See the spec docs.
[2] https://www.loc.gov/preservation/digital/formats//fdd/fdd000...