Combine phone scans and desktop files into 1 clean PDF

What you are combining, and why it goes wrong

The usual pile: a signed form you photographed on your phone, a receipt shot on the kitchen table, and 2 PDFs on the laptop (a lease from the landlord, a payslip from the employer’s portal). The person asking wants 1 file.

Three things make the result look messy: photos on pages of the wrong size, a page that came out sideways, and the 2nd shot of the same page you took “to be safe”. The steps below deal with each.

Step 1: get the photos onto the computer, as files

Move the photos to the computer you will work on, with whatever you already use: AirDrop, a cable, or a shared cloud folder. If you send them through a chat app, send them as documents: WhatsApp, for example, sends a document as a file without recompressing it (WhatsApp Help Center).

If you are working on the phone itself, skip this step: every tool here works in the phone’s browser too.

Step 2: turn the photos into PDF pages

1. Drop the photos on JPG to PDF. It reads JPG, PNG, HEIC (iPhone photos), WebP, AVIF, TIFF, GIF and BMP.
2. Set Paper to the size your other PDFs use: A4 in most of the world, US Letter in the US and Canada. Matching paper is what makes the pages line up later.
3. Leave Margin at 0 and Fit selected, so the whole photo shows without cropping.
4. With several photos, keep Output on One PDF, a page per picture.
5. Press Make the PDF and download it.

Each photo is turned the right way up from the note the phone stores with it, and the location, the device name and the time it was taken are left out of the PDF. A standard JPEG goes in unchanged; HEIC photos go in as JPEG at quality 90. Pictures to PDF has the details for every format.

Step 3: merge everything in order

1. Drop the photo PDF and the desktop PDFs on Merge PDF, in 1 go or a few at a time.
2. Put them in order with Up and Down next to each file. The list shows each file’s page count, which helps you spot the wrong file.
3. Leave Bookmark per file on if the reader should be able to jump from part to part (a 40-page application packet), or turn it off for a short file.
4. Press Merge and download the result, named after the first file with -merged added.

Pages are copied as they are: nothing is redrawn or re-compressed, and every page keeps its own size.

Step 4: fix the stragglers with thumbnails

Merge works on whole files. For single pages, open the merged file in the editor. The page rail on the left shows every page as a thumbnail (on a phone, open More, then Pages).

• Move a page: drag its thumbnail, or select it and press Alt with the arrow keys.
• Turn a sideways page: open the page’s menu and choose Turn right or Turn left.
• Drop the duplicate shot: the same menu, Delete page.
• Add something you forgot: Add pages at the bottom of the rail takes a blank page, Pages from a PDF or Pictures as pages, placed after the page in view.

Every step undoes. When it looks right, Save writes a new file with your changes.

You can also skip steps 2 and 3 entirely: open the first PDF in the editor and add everything else with Add pages. Pictures added that way are fitted on paper the size of the page before them, with a 10 mm margin. For 3 or 4 files this is the quickest route; for 30, the tools above are.

Step 5: make it look like 1 document

• Mixed page sizes. A Letter payslip next to A4 photo pages looks ragged in a viewer. Resize PDF puts every page on 1 paper size (A4, Letter, Legal, A3 or A5) and keeps each page’s way up. Scaling shrinks or grows what is on the page a little; for a form someone must print at 1:1, leave the sizes alone. Merging PDFs with different page sizes weighs both choices.
• Blank shots. A duplex scanner app or a pocket photo leaves empty pages. Remove blank pages finds them; choose Scanned blank for paper that is not pure white.
• Last look. Scroll the thumbnails in the editor once from top to bottom. It takes 20 seconds and catches the upside-down page before the recipient does.

Step 6: check the size before you send

Photo pages are heavy. A 12 megapixel phone photo is about 3 MB, so 5 of them make a 14.7 MB PDF in our tests; a page scanned at 300 dpi in colour is about 1.8 MB. Gmail and Outlook.com stop at 25 MB per message, and the Outlook app’s default for Exchange accounts is 10 MB (Google and Microsoft help pages, as listed in our attachment limits guide).

Run the merged file through Compress PDF with the Email preset. Our 5 photos came out at 395 KB, and a 10-page scan of 17.6 MB at 1.7 MB. Text pages from the desktop PDFs barely change, because text was never the weight. Merged PDF too big explains where the weight comes from, and make a PDF smaller covers the rest.

What this cannot do

A photographed page never looks like a digital page. It has shadows, a slight angle and paper grain, and its text is a picture: you cannot select or search it. If the original exists as a file (the landlord’s lease, the bank’s statement), download that instead of photographing a printout. For a photo or scan that must be searchable, run OCR on the merged file; the guide to searchable scans shows what to expect.

Merging does not straighten a page shot at an angle; it rotates in quarter turns only. What it does keep: each file’s own bookmarks (nested under its entry), links that jump from one page to another, and form fields, which stay fillable. For more page jobs, see the guide to organising PDF pages.