Signal / 043 — Publisher retires, but your PUB files still have an open-source exit

Your documents should outlive the software that created them. On October 14, 2026, The Document Foundation highlighted an open-source migration path for Microsoft Publisher users: LibreOffice and Scribus can import PUB files through the reverse-engineered libmspub library.

The timing matters. Microsoft’s retirement guidance says removal from Microsoft 365 starts on or shortly after October 1, while support for the perpetual version ended October 13. These are separate milestones; ending support does not mean every previously purchased installation instantly stops launching.

The foundation recommends LibreOffice Draw for opening, editing and managing relatively small Publisher documents, while noting that Draw is not a dedicated desktop-publishing application. It also points to Scribus as an open-source publishing option. This is a migration reminder, not an announcement that PUB import was invented this week.

A practical exit plan

Our recommendation: preserve untouched copies first. Try a representative leaflet, a multi-page newsletter and a document with unusual fonts before committing the whole archive. Compare page breaks, text flow, images and print output. Import support should not be read as a promise of pixel-perfect conversion.

Save editable migrated copies separately and retain PDFs as visual references where available. Microsoft also suggests PDF-to-Word conversion, but explicitly warns that graphics-heavy layouts may change. Choose the destination around the document’s job, not just the file extension.

sysVoid take: the win is not winning an office-suite argument. It is making sure next year’s volunteer, colleague or future you can still open this year’s work. Escape the default before the default disappears.

AI-assisted summary checked against the linked sources; no hands-on testing. Featured photo by Ilya Pavlov on Unsplash is illustrative, not a screenshot of LibreOffice or Publisher.