Linux document viewers, editors, opens a range of file formats, like files with the extensions .ppt, .doc,docx, .pdf, .xls and .txt.

The document viewer usually lets you zoom into the documents to read them easily and comfortably.

File viewers do not edit the files, yet it is common for them to be able to export data in a different file format, or to copy information from the viewed to the system-wide clipboard.

A file viewer has limited-functionality, in the sense that it does not have a capability to create a file, or modify the content of an existing one.

Instead, it is used only to display or print the content.

Linux document viewers, editors.

File viewers have to have sufficient knowledge, about the file format to be viewed in order to handle different byte orders, code pages or newline styles.

A text editor on the other hand is a type of computer program that edits plain text.

Text editors are provided with operating systems and software development packages and can be used to change files, such as configuration files, documentation files and programming language source code files.

Then you have the document editors like Textmaker, Libreoffice Writer, that can edit, create and save new documents in different file formats, like for example .pdf.