You can try the Foxit PhantomPDF. There is a feature named “Split” in the app. You can set some configuration as you like. For example, you want to separate the 10 pages into two documents, one with 6 pages, another with 4 pages. Then you can set the “Max” page as “6”. Then you will get two new PDFs.
It also works for images, too. The app does require the free version of iTunes to install. Also, you will need Fox it Software to run the app. How to use Fox it for Microsoft Edge ? Click the Menu (Windows button) > Settings > General > Accessibility (Settings > General > Accessibility). You can then specify the following values in Preferences. “Voice Input“ will allow you to configure the input method for your computer. “Speech Recognition“ (Windows 10 Creators Update) — Allows you to configure what you want Fox it to do when your computer speaks. “Autosave“ (Windows 10 Creators Update) — When you turn your computer off or reboot, Fox it saves the document in case there is a problem. “Split” (Windows 10 Creators Update) — You enable Split in Preferences and you select the “Split” button on the Fox it dialog box to open the Split dialog box and select.