Spire.Office for Java library can be used to convert multiple file types like Word, RTF, Excel, PowerPoint, text and images etc. to PDF. It also provides a free community edition but with some limitations.
The following code example shows how to convert multiple documents (Word, Excel, PowerPoint, PDF and image) within a folder to PDFs and combine the ...
A GUI utility for doing this is gscan2pdf. While it's oriented towards scanning images, it supports combining images in a PDF very easily:
On the menu, choose File | Open.
Choose your files.
On the menu, choose File | Save.
You can usually ignore the resulting dialog; press Save and choose a target filename.
That's it! Quick and easy and ...
I think one of the approaches below might help:
Print only the pages you want into the Microsoft PDF printer. This will work with ANY PDF reader, even the common chromium based browsers (edge, chrome).This isn't drag-n-drop, but it is built in and 'free'.
Use the awesome NAPS2 for image based PDF authoring tasks (and scanning), it's FOSS, specifically GPLv2....
You can embed the image in an <img...> element on a standard HTML web page, create a clickable HTML imagemap (there are interactive editors for that).
Then turn your HTML page into a PDF, using Chrome in headless mode. This would be a command-line call to Google Chrome.
I haven't done this with imagemaps, yet. Only with standard web pages. But Chrome ...