About Merge PDF
Merging is the most-requested PDF operation, and for good reason: documents arrive in pieces. A signed contract comes back as three separate scans, an expense claim needs a dozen receipts in one attachment, a report has its appendix in a different file from its body.
This tool loads every PDF you add, copies all their pages into a single new document in the order you set, and writes out one file. Page content, embedded fonts, images and vector graphics are copied byte-for-byte, so nothing is re-rendered and nothing loses quality.
Order matters, so it is directly editable — drag any document to a new position in the list before merging, and remove anything you added by mistake.
How to merge PDF files
Add your PDFs
Drag and drop up to 20 files, or tap Select Files. Add them in several goes if it is easier.
Put them in order
Drag files up and down the list until the sequence is right. The page count of each is shown to help you check.
Merge
Press Merge PDFs. Every page is copied into one new document on your device.
Download
Save the combined file. Your original PDFs are untouched.
What is preserved
- All page content — text, images and vector graphics — copied without re-encoding.
- Embedded fonts, so the merged document renders identically.
- Original page sizes and orientations; pages of different sizes can coexist in one PDF.
- Internal links that point within the same source document.
What is not carried over
Document-level features that cannot be meaningfully combined are dropped: form field values, digital signatures (which by design become invalid the moment a document is altered), and per-document bookmarks and outlines.
If you need signatures or interactive forms to survive, merge the documents before they are signed or filled in.