Nobody wants eleven photographs of a receipt; they want one document. Phone cameras have replaced the scanner for most everyday paperwork, and what arrives is a folder of images with names like IMG_4471 in whatever order the phone felt like. Collecting them into a PDF gives the set an order, a single name, and a form the person receiving it can actually file.

Using it in three steps

1. 1 Drop your JPG or PNG files - several at once is fine.
2. 2 Set the order with the arrows, then choose a page size or leave it on fit-to-image.
3. 3 Press Create PDF and download the finished document.

Fit to image, or a fixed page size

Fit-to-image gives every page the exact proportions of its picture, so nothing is cropped and no white bands appear. It is the right choice for something that will only ever be looked at on a screen. Choose A4 or Letter when the document will be printed: fixed pages come out of a printer predictably, while a set of oddly-sized pages will be scaled by the print dialogue in ways you did not pick.

File size and why it barely changes

The pictures are placed into the PDF exactly as they are, so the result weighs about as much as the images did together. That is deliberate: re-compressing a photograph to make the PDF smaller would quietly cost you the detail that makes a receipt or an ID card readable. If the total is too large, shrink the images first with an image tool where you can see what each setting does before committing.