ABUTHAHIR KSM

      PDF, or the Portable Document Format is one of the most popular format for document sharing. Its popularity is mainly because PDF files are multi-platform (can be run on most devices without any change in formatting), smaller in size, can be opened on most devices with free software and are difficult to edit as they are "read only".

Despite PDF files being "read only" by default, there are certain tools and software you can use to change the contents of a PDF file for free without resorting to paid software like Adobe Acrobat.