■ Turn xplorer² into an easy PDF to kindle e-book converter

Here is a quick tip. Amazon Kindle e-book reader can theoretically use PDF books, but practically it doesn't work. Either it shows a whole PDF page, where you can't see anything, or you have to work hard zooming and scrolling. Using xplorer², select the PDF book and use Edit > Extract text menu command, and it will create a plain text file based on the PDF. Import the TXT file in kindle and you have a proper reading experience — with a few drawbacks:

If the PDF contains images or mathematical equations, they are lost in the conversion (but Kindle is hardly the tool for academic texts anyway).
Depending on the PDF text filter you have installed, paragraph formatting may be distorted, especially if you use the default windows 10 PDF filter. But if you have a decent PDF reader like sumatra PDF, you should be fine
Make sure you rename the text file to include the book author and title, for easy recognition inside Kindle
If your book is not in English, set xplorer² to extract unicode text. Use Tools > Advanced options menu and in Global page tick the option "Paste text in folder saved as unicode file" (GAOPT_SAVEUNICODETXT setting)

pdf in text viewer