Free online tool
Merge PDF files
Combine several PDFs into one, in the order you choose. You can add photos too; each photo becomes a page.
Works in your browserFiles never uploadedNo sign-upFree
How to use
Merge in three steps
- Choose filesPick two or more PDFs. Photos work too.
- Put them in orderUse ▲ and ▼ to move files, ✕ to remove one.
- MergeTap Merge PDF to download one combined PDF.

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15 photo tools in one Android app: works offline, free, no sign-up.
Questions
Good to know
Are my files uploaded?
No. Your PDF is opened and changed inside your browser on your own device. Nothing is sent to a server.
Is there a size limit?
No fixed limit. Very big files (hundreds of MB) may be slow on older phones.
Will links and text stay?
Yes. Pages are copied as they are, so text stays selectable.