To merge PDFs on your phone without uploading them, open Merge PDF in ProperPDF, pick two or more files, drag them into the order you want and save. The app joins them on the device, so it works offline and you don't need an account. Merging is free on iPhone, iPad and Android. Free exports carry a ProperPDF watermark, which Pro removes.

Merge PDF in ProperPDF at a glance
iPhone and iPadFree, with a ProperPDF watermark on the saved file (Pro removes it)
AndroidFree, with a ProperPDF watermark on the saved file (Pro removes it)
Works offlineYes
Files uploadedNo, processing happens on the device
Account neededNo
RequiresiOS 17 or later on iPhone and iPad; Android 8.0 or later

How to merge PDFs in ProperPDF

  1. Open ProperPDF and tap Merge PDF.
  2. Select two or more PDFs.
  3. Long-press a file and drag it to change the merge order.
  4. Save. The merged PDF appears in your library and the original files stay as they were.
  5. Open the result to check it, then share it from the share sheet.
Merge PDF on Android
The Merge PDF screen in ProperPDF for Android. View full-size screenshot

When merging helps

A contract with its attachments, a visa application with its supporting documents, a month of receipts: one PDF is easier to send and easier to find later than five separate files.

Merging copies the pages as they are. It doesn't re-compress them, so text and scans look the same as in the originals.

After you merge

Use Organize Pages to reorder, rotate or delete pages in the merged file. If it's too big for email, Compress PDF (Pro) saves a smaller copy.

Questions

Is merging PDFs free in ProperPDF?

Yes, on both iPhone and Android. The saved file gets a ProperPDF watermark unless you have Pro.

Are my PDFs uploaded when I merge them?

No. ProperPDF merges the files on your phone and doesn't send them to a server, so it also works in airplane mode.

Does merging lower the quality of my PDF?

No. The pages are copied into the new file without being re-compressed.

Can I merge PDFs on iPhone without an app?

On iOS 26 and later, yes: Apple's Preview app can insert pages from another PDF. See our guide to merging PDFs on iPhone without an app.