Turn JPG images into PDF files — each image becomes a one-page PDF, for forms that only accept documents.
Each JPG becomes its own one-page PDF. The page is exactly the size of the image, at one point per pixel, so a 1,200-pixel-wide photo makes a page 1,200 points (about 42 cm) wide. That sounds large, but PDF viewers scale big pages to fit the screen, and when printing, the fit-to-page option in the print dialog shrinks it onto paper. Nothing is padded, cropped or forced onto A4, so a receipt photo stays a receipt shape and a panorama stays wide.
The picture is embedded as a JPEG, so the quality setting applies: Recommended (82) keeps documents and photos looking clean at a moderate size, High (94) is the choice for fine print, stamps or signatures, and Smaller (62) helps when a form has a strict file-size limit. Because the image is re-encoded, the PDF is not a byte-for-byte wrapper around your original JPG, and camera metadata such as location is not carried into it. Transparency is not a concern here, since a JPG has none.
Submitting a photographed ID, certificate or receipt to a portal that only accepts PDF; turning a scanned page into a document for an email; or archiving a picture in a format office software opens without question. Several PDFs can be downloaded together as a ZIP, each named after its image with _conv and a .pdf extension.
Everything runs inside your browser. Because the image never reaches a server, we cannot store it or look at it. That difference matters when the file is company material or a personal photo.