Merge PDF
Combine several PDF files into a single PDF, right in your browser.
Merge PDF files without uploading them
This PDF merger stitches several PDFs into one document. Each file is opened with pdf-lib, every page is copied into a fresh PDF, and the result is saved back to your device — all inside your browser. Because nothing is uploaded, even sensitive contracts, invoices or scans never leave your computer.
Order matters
The files are merged in the order you select them, top to bottom, so pick them in the sequence you want the final PDF to read. You can combine as many PDFs as you like; the tool copies every page from every file and writes a single, ready-to-download document.
How to use the Merge PDF
- Choose your PDFs. Select two or more PDF files from your device.
- Merge. Click Merge PDFs — the files are combined instantly in your browser.
- Check the message. Confirm how many files and pages were combined.
- Download. Save the single merged PDF straight to your device.
Frequently asked questions
In what order are the PDFs merged?
In the order they appear in the file picker — the first file becomes the first pages of the merged PDF, and so on.
How many PDFs can I merge at once?
As many as your device has memory for. The tool copies every page from every file into one document; there is no fixed limit.
Are my PDF files uploaded to a server?
No. The merge runs entirely in your browser with pdf-lib; your files never leave your device and nothing is stored or seen by any server.
Will the merged PDF keep its quality?
Yes. Pages are copied as-is, so text stays selectable and images keep their original resolution — there is no re-compression.