There are free web services that provide free JPG-to-PDF conversion, such as JPG2PDF.com or Smallpdf.com. Free offline conversion software is also available from Softonic.com, including Wondersoft JPG to PDF Converter and JPEG to PDF.
JPG2PDF.com provides support for converting multiple JPG images to a single PDF file, and has no restrictions such as file size limits, usage limits or watermarking. SmallPDF.com makes similar claims and also handles other image formats, including PNG and BMP files.
Offline conversion software is more suitable for large conversion tasks, because it is time-consuming to upload many JPG images to an online converter. Wondersoft JPG to PDF Converter has options for bulk conversion, so users can convert entire folders of images to PDF at once.