Multi PDF Converter is a native desktop app for Windows and macOS that converts between PDF and image formats in bulk.
Conversion runs on the user's computer and files are never uploaded to a server, so confidential documents stay in-house. Drag in files or whole folders, right-click them in File Explorer, or click Choose files, and outputs land in a folder you pick. Available in 15 languages. Native builds for Windows 10/11 (64-bit) and macOS 13+, Apple silicon and Intel. The first 3 conversions are free, any number of files each; paid plans have a 30-day money-back guarantee.
This is one of the first programs I load on a new PC. It's easy to use and never fails. PDF to JPG or JPG to PDF.
I've been using Multi-pdf for years - so easy to use, and never let me down.