How to Merge PDF Files on iPhone

Two scans, a downloaded form, and an emailed attachment — that should be one document. Here's how to combine PDFs into a single file right on your iPhone, no computer required.

The quick answer

Import the PDFs into a PDF editor app, select them in the order you want, and merge. The result is one continuous document you can rename, compress, sign, or share.

Step-by-step: combine PDFs into one

1. Import your files. Mobile Document Scanner accepts PDFs from the Files app, email attachments, or your existing scans.
2. Choose the merge tool and select the documents in the order they should appear.
3. Fine-tune the pages. After merging you can rearrange, rotate, or delete individual pages.
4. Save and share the single combined PDF.

When merging beats rescanning

If the pages already exist as PDFs — old scans, downloaded forms, email attachments — merging is instant and lossless. Only rescan when the original file quality is poor.

Splitting instead of merging

Need the opposite — pulling three pages out of a fifty-page PDF? The split tool breaks large PDFs into smaller files, so you can send just the section that matters.

Merged file too large?

Combining several scans can produce a heavy file. If it bounces from someone's inbox, compress the PDF before sending — it usually shrinks dramatically with no visible quality loss.