FlexiPDF

Despite the fact that PDF files provide one of the most convenient manners to exchange data inside a multi-platform network, not all Windows editions feature a dedicated PDF viewer (available in Windows 10). PDF editors, such as FlexiPDF, grant you the right to modify the content of the file, rather than just viewing it.

FlexiPDF is a PDF viewer and editor that features basic text processing and object management tools ready to help you alter the content of any PDF document. Moreover, it can create new PDF files or export existing ones in various formats, for further editing.

The application can handle multi-page PDF documents but, unfortunately, it cannot open more than one document inside the same window. On the plus side, it displays page thumbnails, which makes the navigation within the document much easier and faster.

The text editor comes with basic options to customize the font style, change the text spacing and the paragraph layout. Aside from these simple options that can be found in any text editor, this application enables you to insert new pages in the PDF or remove unwanted ones, export PDF content, or send it via email.

Additional tools are meant to help you remove page areas you don't need, merge text columns to improve workflow, insert and manage hyperlinks. Moreover, larger texts can be automatically turned into article threads to structure the information and make it easier to read.

While its interface would need a makeover to match today's trends, FlexiPDF is a good PDF viewer and editor. The Pro edition allows text translation and features OCR support, also providing encryption tools for your documents.

Opening multiple documents is possible but in different windows. Implementing a tab-based GUI to allow users to work with more than one document at a time would definitely add to its value.