How to Turn Phone Photos of Documents into One Clean PDF

You need to send a document as a PDF, but there is no scanner nearby. Your phone camera can do the job: take a photo of each page, then put the photos together into one PDF. This guide covers how to take photos that read like a scan, how to build the PDF, and how to keep it small enough to email or upload.

The quick way: from photos to PDF

1. Crop each photo in your phone's gallery app so only the page is left. The PDF tool places photos as they are and does not crop.
2. Open JPG to PDF and add your photos: up to 50 JPG, PNG or WebP images, 25 MB each. On a computer you can also paste a screenshot with Ctrl + V.
3. Put the pages in order by dragging the images, or with the arrow buttons. Press the rotate button on any page that is sideways.
4. In PDF settings, choose A4, Auto orientation and a Small (10 mm) margin.
5. Press Convert to PDF and download images.pdf. Rename it to something the receiver will recognise.

The PDF is put together by your browser, so the photos are not uploaded anywhere. That is worth knowing when the pages are ID cards, bills or medical reports.

Take photos that read like a scan

The PDF can only be as clear as your photos. A few habits make a big difference:

• Use bright, even light. Daylight near a window works well. Avoid the flash on glossy or laminated papers, because it leaves a white glare spot over the text.
• Hold the phone straight above the page. If the phone is tilted, the page turns into a slanted shape and the lines at the far end look smaller.
• Put the page on a plain, darker surface, so its edges are easy to see and to crop.
• Fill the frame with the page, and keep your fingers and shadows out of it.
• Tap the screen to focus on the text, then zoom in on the photo to check that small print is sharp before you move on.
• One page per photo. Each image becomes one page of the PDF. The tool cannot place two photos on one page.

Crop and shrink before you convert

Two things about this tool explain why preparing the photos pays off.

First, it does not crop. Whatever is in the photo, such as the table top, a pen or your thumb, ends up on the page.

Second, JPG photos go into the PDF without being compressed again. That keeps their full quality, but it also means the PDF is roughly as large as all the photos added together. Say you photograph 8 pages of class notes and each photo is about 3 MB. The PDF will be about 24 MB, which can be too large to attach to an email and is likely to be over an upload form's limit.

The fix is to make the photos smaller first. For a page that will mainly be read on screen, you do not need anything like the full resolution of a phone camera. An A4 page at 150 pixels per inch is about 1240 × 1754 pixels, which is sharp enough to read comfortably on a screen.

A worked example: a portrait phone photo of 3000 × 4000 pixels holds 12 million pixels. Resized to 1240 pixels wide with the same proportions, it becomes 1240 × 1653, or about 2 million pixels, roughly a sixth of the original. Fewer pixels usually mean a much smaller file.

1. Resize the photos with Image Resizer: enter a width of 1240 pixels and leave the height empty, so each photo keeps its proportions.
2. If they are still large, lower their quality a little with Image Compressor.
3. Then convert them with JPG to PDF as usual.

If the receiver will print the document and needs fine detail, keep more pixels, for example about 2480 pixels wide for 300 pixels per inch on A4.

Choose the page size, orientation and margin

Page size. Choose A4 for documents that may be printed in India, the UK, Europe and most other countries, and US Letter for the United States and Canada. With either size, each photo is centred and scaled to fit inside the margins, and nothing is cropped or stretched. Fit page to image makes each page the shape of its photo, with no white border, which suits a PDF that will only be read on screen.

Orientation. Auto gives a landscape photo a landscape page and a portrait photo a portrait page. That is right for a genuinely wide page, such as a large table. If a portrait page was photographed with the phone held sideways and shows up rotated, press the rotate button instead of changing the orientation.

Margin. Small (10 mm) looks like an ordinary printed page. Choose None if you cropped tightly and want the page edge to edge, or Large (25 mm) if there should be room around the content.

Enlarge small images. Leave this on for document photos so each page fills the sheet. Turn it off for small pictures, such as a signature or a logo, so they keep their own size instead of being stretched and looking blurred.

iPhone photos and other formats

Many iPhones save photos as HEIC by default, and HEIC files cannot be added. You can switch the camera to JPG in Settings › Camera › Formats › Most Compatible, or share the photos as JPG. GIF, BMP, TIFF and SVG files are not accepted either, so convert them to JPG or PNG first.

Phone photos often carry hidden details, such as the date, the camera model and the GPS location where the photo was taken. The tool removes these from JPG photos before they go into the PDF, which is useful when you photograph documents at home.

Mistakes to avoid

Expecting the text to be searchable. The pages are pictures, and the tool does not run text recognition (OCR). Nobody can select or search the words in the PDF.

Photographing a PDF on a screen. If a document is already a PDF, keep it as one. To send it together with your photo pages, combine the two PDFs with Merge PDF instead of taking a picture of your screen.

Skipping the final check. Open the PDF and scroll through every page. Look for pages in the wrong order, a sideways page or a blurred line before you send it.

Wrapping up

Good light, a straight angle and a tight crop do most of the work. Shrink large photos first, then turn them into one PDF with JPG to PDF on A4 with a small margin, and check every page before you send it. More tools for PDFs are in the PDF tools section.