PDF Arranger is an open-source application for managing and modifying PDF files.
You can open a PDF file from the menu, or drag and drop the PDF directly into the application.

PDF Arranger helps the user to merge or split PDF documents and rotate, crop and rearrange their pages using an interactive and intuitive graphical interface.
The author’s web link:https://github.com/pdfarranger/pdfarranger
Webmaster’s note:you will download the Portable version on my website.