Microsoft Publisher documents can be exported as simply Rich Text Format documents (*.rtf) with several programs, including some online conversion services. Only the texts will be converted, any other graphics elements or special formatting will be lost.
Found 2 different conversion types using the same filename extensions.
Conversion pub to rtf type 1:
Convert from Microsoft Publisher document to Rich Text Format document.
Multiplatform software - convert pub to rtf on any platform
Apache OpenOffice Writer (OpenOffice.org Writer) is a fully-featured and free word processor and text editor from OpenOffice.org productivity suite.
Apache OpenOffice Writer is simple enough for a quick memo, yet powerful enough to create complete books with contents, diagrams, indexes, etc. You're free to concentrate on your ideas while Writer makes them look great.
File type (from-> to)
Convert from pub file
Microsoft Publisher document
to rtf file
Rich Text Format document
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned pub to rtf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
LibreOffice Write is a complete word processor and document publishing tool that supports a plethora of document formats and has many innovative features. It's an open source software that comes as an integral part of LibreOffice suite.
Conversion pub to rtf type 2:
Convert from Publication document file to Rich Text Format document.
Microsoft Windows software - convert pub to rtf on Windows
One of the first desktop publishing programs, introduced in 1985 by Aldus Corporation, initially for the then-new Apple Macintosh and in 1987 for PCs running the then-new Windows 1.0.
It was later bought by Adobe and rebranded Adobe PageMaker. The last version Adobe PageMaker 7 was released in 2001 and in 2004 the product was discontinued and slowly replaced by Adobe InDesign.
Apple macOS / Mac OS X software - convert pub to rtf on OS X
A desktop publishing software, used to create high-quality publications such as brochures and newsletters.