The PRN file format represents a print ready document. It is basically used for barcode designing in SwilERP software. PRN file contains data with instruction sets for printers, such as what to print, paper size, product name, MRP, etc. It’s very few often used for document sharing because it only gets created when a printing command is given. PRN file is an original document that is used for barcode printing, and this is provided by BarTender. So, you can not make modifications to the document inside.