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You can convert PUB files to PDF using the Microsoft Publisher software itself or use the free online Publisher to PDF converter tool.

Have you just downloaded a work PDF and suddenly found the file has the extension of a text file (TXT) or even no extension at all? Well, luckily for you, there is an easy way for you to fix this ...

To change the file type of multiple files in the same folder, use the following command. You have to replace file type with real file formats like JPG, PNG, Docx, PDF, etc.

For instance, if your eReader supports PDF files but your book is in FB2 format, it may seem helpful to change the extension. However, in such cases, you'll actually need to convert the file type.