How to Turn Phone Photos of Documents Into One PDF
By Docmint Team · · 4 min read
Combine phone photos of a document into one PDF in the right order, pick A4 or Letter pages, then compress it or make it searchable with OCR.
To turn phone photos of a document into one PDF, move the photos to your computer, drop them into Docmint's JPG to PDF, drag them into page order, choose A4 or Letter with a small margin, and click Create PDF. Each photo becomes one page; afterwards you can shrink the file with Compress PDF or make it searchable with OCR PDF.
Take photos that make a good PDF
The tool embeds your photos as they are, so the quality of the PDF is the quality of the photos. A few habits make a big difference:
- Lay the page flat on a dark, plain surface so its edges stand out.
- Use even daylight or a bright room, and avoid the shadow of your phone and hand falling across the page.
- Hold the phone directly above the page, parallel to it, so lines stay straight rather than turning into a trapezoid.
- Fill the frame with the page, and crop out the table and background in your phone's photo editor before transferring.
- Photograph pages in order. Most phones name photos sequentially, which makes ordering later easier.
Getting the photos onto your computer (and the HEIC catch)
AirDrop, a USB cable, a cloud drive or emailing the photos to yourself all work. One thing to watch: iPhones often save photos as HEIC, a format most browsers cannot read. You can set the iPhone camera to its Most Compatible format to shoot JPG, convert existing HEIC files with Convert Image (Safari can decode HEIC), or export the photos as JPG from your phone.
JPG to PDF accepts JPG, PNG, WebP, GIF (first frame) and BMP.
How to make one PDF from photos with Docmint
The PDF is built in your browser; the photos are not uploaded anywhere.
- Open JPG to PDF and drop in all the photos for the document.
- Drag them into the order you want them to appear as pages.
- Choose the page layout: A4 or Letter with a small margin for documents, or Fit to image to keep each photo's exact dimensions.
- Pick portrait or landscape, or auto-orientation so landscape shots get a landscape page.
- Click Create PDF. Each image becomes one page. Scroll through the result to check the order.
Which page size should you choose?
For documents, choose the paper size the recipient uses: Letter in the US and Canada, A4 in most other countries. With a standard page size, the PDF prints at a sensible scale and every page has the same dimensions, which looks tidy when someone scrolls through it. A small margin keeps the edges of the page from being cut off by printers.
Fit to image makes each page exactly the size of its photo. That suits photos of whiteboards, drawings or receipts of odd sizes, where you don't want white borders, but the pages will have different sizes and may print at unexpected scales.
Portrait, landscape or auto?
Phone photos of documents are usually portrait, so portrait pages fit most jobs. If some photos are of wide items, such as a spreadsheet printout or a two-page spread, auto-orientation gives those a landscape page instead of shrinking them onto a portrait one. If a page still comes out sideways because the photo itself was taken at an angle, fix it afterwards with Rotate PDF.
The PDF is too big. What now?
Because JPGs are embedded without re-encoding, a PDF of ten full-resolution phone photos can be tens of megabytes. You have two options. Before creating the PDF, run the photos through Compress Image, lowering quality slightly and limiting the maximum width; this also strips camera and location metadata. Or create the PDF first and pass it to Compress PDF with Continue with; Balanced or Strong work well on photo-based pages.
How do I make the PDF searchable?
A PDF made from photos contains pictures of text, not text. To search it, copy from it or let others find words in it, run OCR PDF on the result. Pick the document's language, and the recognizer (Tesseract, running locally in your browser) adds an invisible text layer on top of each page while keeping your original images.
OCR accuracy depends on the photos: sharp, straight, well-lit pages work best, and tilted text reduces accuracy sharply, so rotate crooked pages first. If you plan to both compress and OCR, compress first and run OCR as the last step, so the text layer is added to the pages you will actually send. You can chain these steps in a pipeline, or describe the job to the home page assistant.
Other ways to do it
Phones have built-in document scanners: the Notes and Files apps on iPhone, and the Google Drive app on Android, can capture pages, crop them and save a PDF directly. If you are scanning from scratch with your phone in hand, those are a good option. JPG to PDF is useful when the photos already exist, when they came from someone else, or when you want control over page size, order and orientation on a bigger screen.