Q: Once a PDFImages object is created, is it safe to share it between threads and call com.qoppa.pdfImages.PDFImages#savePageAsJPEG method from multiple threads on single object at once?

A: Yes, PDFImages was developed to be thread-safe and for the same PDFImages object, i.e, for one PDF document loaded, it is safe to call savePageAsJEG from multiple threads allowing to convert different PDF pages from the same PDF document to JPG images from separate threads.