How to Combine Scanned Documents into One PDF

To combine scanned documents into one PDF, scan each one to PDF, then join the files with a free merge tool and fix the order and orientation before you send it. Most phones can scan to PDF without an extra app.

Scanning paperwork is easy — keeping it organised is the hard part. One scan per page, files called "Scan_0034.pdf", a page that went through upside down... By the time you're ready to email it, you have a folder full of files instead of one clean document.

This guide walks you through turning a pile of scanned pages into a single, well-ordered PDF, for free, whether you scan with a scanner, a printer or your phone.

Step 1: Scan your documents to PDF

Before you can combine scans, they need to be PDF files. Most devices can do this:

• Office scanner or printer: choose PDF as the file format in the scan settings. If there's an option for multi-page PDF, turn it on — it saves you a step later.
• iPhone or iPad: open the Files app (or Notes), tap the More button and choose Scan Documents. Line up each page and save — you get a PDF.
• Android: open the Google Drive app, tap + and choose Scan. Drive saves the result as a PDF.

Tip: scan on a flat, contrasting surface in good light. Clean, straight scans are easier to read and smaller in size.

Step 2: Combine the scans into one PDF

1. Open PDFixed Merge PDF on your computer or phone.
2. Click Select PDF files and choose all your scans at once — you can add up to 50 files.
3. Each file shows a preview of its first page, so you can check what's inside.
4. Put them in order:
   • drag the cards into place, or
   • use A → Z to sort by file name — perfect when your scanner numbers files automatically.
5. Click Merge PDF, then Download merged PDF.

For more detail, see our full guide on how to merge PDF files.

Keep sensitive scans private

Scanned documents are often personal: ID cards, bank statements, medical letters, signed contracts. PDFixed merges them inside your own browser, so the scans never leave your device. Read more in is it safe to use online PDF tools?

Step 3: Fix sideways and upside-down pages

It's common for one or two scanned pages to come out rotated. To fix them permanently:

1. Open Rotate PDF and add your combined file.
2. Click any page that's the wrong way round to turn it 90°.
3. Click Rotate PDF and download the fixed file.

See how to rotate a PDF permanently for tips.

Step 4: Remove blank pages and fix the order

Double-sided scanning often adds blank back pages. Open Organize Pages to:

• delete blank or duplicate pages,
• drag any page that ended up in the wrong place,
• rotate stray pages at the same time.

Then save once, and your document is ready to send.

Should I scan in colour or black and white?

Higher resolutions than 300 dpi rarely help readability but make files much bigger — a problem when an email or upload form has a size limit.

Can I search or edit the text in my scanned PDF?

Not straight away. A scanned page is a picture of text, so you can't search it, copy from it or change a word. To make the text usable, it needs OCR (optical character recognition), and for edits, careful correction afterwards. Our guide on why you can't edit text in a scanned PDF explains your options.

When to hand it to an expert

If your scans are crooked, faint, stained or need to look like a professionally produced document — with searchable text, bookmarks, consistent page sizes and a clean finish — our PDF experts can restore and assemble them for you.