Merge PDF
Signed pages, cover letters, appendices and scans often arrive as separate PDFs when what you need to send is a single document. Merging them puts everything in one file, in the order you decide.
The files are read and recombined in your browser with pdf-lib, so confidential paperwork is never handed to a web service.
Runs in your browser. Merge PDF processes your input on your own device. Nothing you enter or upload is sent to a server.
How to use the Merge PDF
- Upload two or more PDFs — you can add more at any point.
- Drag the files into the order you want, or sort them by name.
- Merge them into a single PDF.
- Download the combined file.
Supported formats: PDF input; PDF output.
Things worth knowing
- Password-protected and encrypted PDFs cannot be merged.
- Merging many large files is limited by the memory available to your browser tab.
Frequently asked questions
Are my files uploaded to a server?
No. Every file is parsed and merged in your browser, so nothing leaves your device.
Can I control the page order?
Yes. Each file is a row you can drag to reposition, and there is a sort-by-name option. Pages are added in the final top-to-bottom order of the list.
Do the merged pages keep their original quality?
Yes. Pages are copied across unchanged — text stays selectable and the layout is untouched. Nothing is re-rendered or re-compressed.
Will it open a password-protected PDF?
Encrypted files generally cannot be read by the tool. Remove the password in your usual PDF reader, then merge the unprotected copy.