How to Scan Documents Into One PDF With Your Phone

Visa forms, insurance claims, job applications and expense reports all ask for documents as a single PDF. You do not need a scanner: a phone camera and two free tools are enough, and the result can look as clean as a scan.

Step 1: Photograph each page well

The quality of the PDF depends almost entirely on the photos.

• Light: daylight near a window, or bright even room light. Avoid the phone's flash, which creates a bright spot.
• Flat: put the page on a dark, plain surface so the edges stand out, and smooth out folds.
• Straight on: hold the phone parallel to the page, directly above it, so the text is not slanted.
• Fill the frame: get close enough that the page fills most of the photo, with a little margin around it.
• Sharp: tap the text on the screen to focus before taking the photo, and check by zooming in.

Phones also have built-in document scanning: on an iPhone, open Notes, tap the camera icon and choose Scan Documents; on Android, the Google Drive app has a Scan option. They straighten and crop pages automatically and save a PDF you can combine with others below.

Step 2: Turn the photos into one PDF

1. Open JPG to PDF on your phone or computer.
2. Add all the page photos. Each photo becomes one page.
3. Check the order in the numbered list. Move pages with the arrows, or rename files 01, 02, 03 and tap Sort by name.
4. Choose A4 (or Letter in the US and Canada), Auto orientation and a Small margin.
5. Tap Create PDF. It downloads straight away.

JPG photos go into the PDF exactly as they are, with no extra compression, and photos your phone saved sideways are turned upright. PNG screenshots work too, via PNG to PDF. Nothing is uploaded: the PDF is made on your device.

Step 3: Combine with other PDFs

If you already have some documents as PDFs, for example a downloaded bank statement, combine everything into one file:

1. Open Merge PDF and add the PDFs, including the one you just created.
2. Arrange them in order. The page count of each file is shown, so you can check the total.
3. Tap Merge.

Pages are copied exactly: text stays searchable and nothing is re-compressed. Password-protected PDFs need their password removed first; the tool tells you which file is protected.

Step 4: Keep the file within upload limits

Many portals limit uploads to 1, 2 or 5 MB. A PDF made from phone photos is roughly the size of its photos added together, and a single phone photo can be 3 MB. Shrink the photos before making the PDF:

1. Open the image compressor.
2. For a document of several pages, choose File size and set around 200–300 KB per page, or use Quality with Resize set to a longest side of 2000 px.
3. Download the compressed photos (as a ZIP for many pages) and use them in Step 2.

As a rule of thumb, a 10-page document at about 250 KB per page makes a PDF of about 2.5 MB that is still perfectly readable.

Checklist before you submit

• Every page is present, in order, and the right way up.
• Text is readable when zoomed in, with no glare or shadows across it.
• The file is within the size limit.
• The file name says what it is, for example passport-application-documents.pdf.

Common mistakes