XnView MP stands for Multi Platform = it is available for Windows, Linux and MacOS. It is a continuation of the older XnView Classic. In my opinion it is a great alternative to Windows photos app or any Linux image viewer that comes preinstalled. I even think it is an alternative to IrfanView. It is really fast and simple to use, supports more than 500 image formats, has built in folder browser, image converter, editor... AND MORE!
jpg2pdf.com - Convert JPG to PDF with this free and easy to use online converter.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
Jpgtopdf.live - Our JPG to PDF converter helps to convert single or multiple JPG images to PDF and also offers OCR-based JPG to PDF conversions quickly.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
Smallpdf - PDF document management and conversion suite
JPEGView - JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images.