PUB file format is used by Publisher applications to save the document which is to be published. This file format is used by Publisher application to create and edit publications.
This format works in a similar way as compared to Word Processing applications with one difference that the focus is on layout and design of the page as compared to the proofing and text composition. The files that are saved in PUB file format are ready for printing. This file format saves the detail about layout of individual file along with the image files and graphics that are added to the document.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .PUB file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .PUB file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .PUB file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.
There may be several reasons why you cannot open the file with .PUB extension. Directly on this website you can find a solution of the most common problem with the .PUB file – that you do not have on your computer the appropriate program to open the file.