Opening Microsoft Office files without the relevant Microsoft Office software is useful if you want to view a file without paying for or installing the full application. Unlike Microsoft Word or PowerPoint, which both have official freeware viewers for their file associations, there is no Microsoft Publisher file extension file viewer. Microsoft Publisher creates PUB files, which can only be opened with the Microsoft Publisher software. However, you can convert the files to other document types and then open them in other software.
Navigate to Zamzar (see Resources). Click "Browse" under Step 1 and locate your Publisher document. Click the drop-down menu in Step 2 to choose the file type you would like to convert the file to. DOC or PDF are the easiest files to work with. Enter your e-mail address in Step 3 so that Zamzar can e-mail the converted file to you. Click "Convert" in Step 4.
Navigate to PDF Online (see Resources). Click "Browse" in Step 1 and locate the PUB document you wish to convert. Enter a file name and your e-mail address in steps 2 and 3, and click "Upload and Convert to PDF" to convert the Publisher file to a PDF file. You will be sent an e-mail with your converted file, which you can then open with a PDF reader. While the website says Word to PDF, you can convert a PUB file.
Navigate to PDF Converter (see Resources). Click "Browse" next to the Source File field, enter your e-mail address in the appropriate field and click "Convert Your File." You will be e-mailed a link to download your file as a PDF.