Images to PDF
Turn your JPG or PNG photos into a PDF file: even several images into a single document, one per page. Everything runs in your browser.
JPG, PNG or WebP, you can pick several (order = page order)
Why convert photos to PDF
PDF is the most convenient format for sending documents: it keeps the page order, opens on any device and is perfect for photos of documents, receipts, notes or signed contracts to email or upload to a portal.
A4 or match the image?
With A4 each photo is fitted and centered on a standard page, ready to print. With Match the image the page takes exactly the photo's proportions, with no white borders, ideal for screenshots and graphics.
Why a PDF instead of the photos
Because it holds the order together: ten photographs of a contract sent as ten attachments arrive shuffled, and whoever receives them has to work out which one is page three. In a PDF the order is what it is, and stays that way even after being forwarded three times.
Then because it is the format every office accepts: forms, applications, expense claims, registrations. A JPG gets rejected or printed badly, a PDF does not. And because it opens the same everywhere: the same page, the same size, without depending on the software the reader happens to have.
A4 or the size of the image
A4 is the right choice when the document will be printed or sent to an office: each photo is fitted and centred on a standard page, and the result looks like a document. It is also the choice that makes the PDF useful when the photos have different sizes, because it evens everything out.
Same as the image is for when the PDF will stay on screen and the proportions matter: a poster, a long screenshot, an already framed scan. The drawback is that a PDF with pages of different sizes prints badly, so it should be avoided if anyone might print it.
Size, and where it comes from
A PDF of photographs weighs as much as the photographs: converting compresses nothing by itself. Ten five-megabyte phone photos give a fifty-megabyte PDF, which hardly any form accepts and no mailbox lets through.
The solution is to act beforehand, on the images: reducing them to 1600 pixels on the long side and compressing them is nearly always enough to bring the total under five megabytes, and for a photographed document nothing legible is lost. Reducing afterwards, on the PDF, is harder and gives worse results.
Three checks before sending it
That the pages are the right way up: a photo taken rotated stays rotated in the PDF, and an office receiving it on its side often rejects it. That they are legible at one hundred per cent, not in preview: a document photographed in poor light looks fine as a thumbnail and illegible enlarged.
And that there is not more than needed in the frame: the table, the floor, part of another document. Cropping the photos before converting makes the PDF lighter, more legible and less indiscreet, and it is the step almost everyone skips.
Nearby tools
For the opposite direction there is PDF to images. Before converting you need Resize photo and Compress image, and for a crookedly photographed document Straighten a photographed document. To sign the result there is Sign a PDF.