PUB file extension is used by documents generated by Microsoft Publisher, a publishing program for creating professional documents and marketing materials; the program is available as a part of Microsoft Office suite. PUB files can store various elements, such as raster or vector images, formatted text, and drawings.

PUB format capabilities

PUB format is universal in the sense that it allows users to create advanced projects, including leaflets, brochures, or web page layouts. The latter, however, are commonly created using professional WWW webpage editors. PUB files can also be used for generating spreadsheets or merging and storing email messages. PUB format is used both by amateurs and professionals alike.

PUB compatibility issues

PUB documents containing large amounts of text can be exported into DOCX files for further editing using MS Word. PUB format underwent some changes over the years and gradually became less compatible with other programs, making it sometimes a necessity to export PUB documents into other formats.