JPG to PDF Converter

What this converter does

Many offices, colleges and insurers ask for documents as one PDF rather than a pile of photos: the front and back of an ID card, the pages of a signed agreement, a set of bills for a claim. This tool takes your images, puts each one on its own page and joins them into a single PDF file that opens the same way on any phone, laptop or printer. You decide the order, the page size and how much white space goes around each image.

How to use it

1. Drop your JPG, PNG or WebP images on the box, or tap it to pick them. You can add more later and they join the end of the list.
2. Put the pages in order with the up and down arrows next to each image, and remove any you added by mistake.
3. Choose a page size. Fit to image makes every page exactly the size of its picture; A4 and Letter give printable pages.
4. For A4 or Letter, choose the orientation and the margin.
5. Press Make PDF. The file downloads straight away.

Page size, orientation and margins

A4 is 210 x 297 mm and is the standard paper size in India and most of the world. Letter is 8.5 x 11 inches, used mainly in the United States and Canada. On either, each image is scaled to be as large as possible inside the margins without cropping or stretching, and then centred. With Auto orientation, a picture that is wider than it is tall gets a landscape page and a tall one gets a portrait page, so a mix of receipts and wide screenshots still fills each page well. Choosing Portrait or Landscape forces the same orientation for every page, which looks tidier when printing a bound set.

A worked example

Say you add a 3000 x 4000 pixel phone photo of a document, choose A4, Auto and a Small 10 mm margin. The area inside the margins is 190 x 277 mm. The photo is three units wide for every four tall, so the width is the limit: it is drawn 190 mm wide and about 253 mm tall, with roughly 22 mm of white above and below it. With Fit to image, the same photo would instead become a page shaped exactly like the photo, with no white space at all.

Quality and file size

JPG images are placed into the PDF as they are, without being compressed again, so they keep their original quality, and PNG images are stored without loss. WebP images are converted to JPG at 92 percent quality first, because PDF has no WebP support. Phone photos that are saved sideways with a rotation tag are turned upright first and saved again at the same 92 percent quality. Because the images go in mostly untouched, the PDF is about as large as the images added together: five 3 MB phone photos make a PDF of around 15 MB. If a portal has a size limit, shrink the photos first with the Image Compressor.

Private by design

The PDF is assembled by your own browser with the open source pdf-lib library, which is downloaded once when you press Make PDF. Your images are never uploaded to Ur Next Door or any other server, so it is safe to use with Aadhaar copies, bank statements and medical reports.