JPG is a image file format and PDF is a document file format. PDF files can hold images as well as text. Both of these file format are very portable and is used as preffered file format in many occations.
JPG is a common file format used on Scanners and Digital Cameras. The reason is that JPG format allow high compression of image data without loosing much of it's perceptive quality.
PDF is another very common file format. It is the predecisor of PostScript and allow much higher quality when it comes to printing documents.
JPG and PDF are two of most widly used file format. Virtually all operating systems and browsers support these formats out of the box.
PS2PDF JPG to PDF converter let you upload any .jpg and .jpeg file and converts them to PDF file(s). You can either choose to combine them or create separate PDF for individual JPG/JPEG file you upload.
JPG to PDF converter let you customize page margin, paper size (A4, A5, legal letter, ...etc) before converting images. You can also choose where to place the image, i.e. center and top, on PDF file.
JPG files can be very large. PS2PDF converter let you choose the image quality and transparency to reduce output PDF file size.
You can double click and open .jpg files in Windows Photo Viewer. You can also use any browser to view JPEG images.
Mac OS build in photo viewer can open JPG files.