Merge PDF
Combine multiple PDFs into one file.
100% private — runs in your browser, nothing is uploaded.
Click to upload or drag & drop PDFs
Select two or more PDF files
How to use the Merge PDF
- 1Upload your PDFs
Drag and drop or click to select two or more PDF files.
- 2Set the order
Use the up and down arrows to arrange the files as you want them.
- 3Merge
Click Merge to combine every file into one PDF.
- 4Download
The combined PDF downloads automatically to your device.
Free online PDF merger
This merge PDF tool combines several PDF documents into a single file in seconds. Add your files, put them in the right order and download one tidy PDF — perfect for joining chapters, invoices, scanned pages or reports.
Private and secure by design
Unlike most online PDF mergers, this tool never uploads your documents. Everything runs locally in your browser, so sensitive contracts, statements and personal files stay on your computer. There is no sign-up, no watermark and no file-size paywall.
When to merge PDFs
- Combine multiple scanned pages into one document.
- Join invoices or receipts before sending them to accounting.
- Assemble chapters or sections into a single ebook or report.
- Bundle forms and attachments into one file for email.
Frequently Asked Questions
How do I merge PDF files into one?
Upload two or more PDFs, drag or use the arrows to set the order you want, then click Merge. A single combined PDF downloads instantly.
Are my PDF files uploaded to a server?
No. The merge happens entirely in your browser using the pdf-lib library, so your files never leave your device. It is completely private and works offline.
Is there a limit on how many PDFs I can combine?
There is no fixed limit — you can merge as many PDFs as you like. Very large files are limited only by your device's available memory, since everything is processed locally.
Will merging reduce the quality of my PDFs?
No. Pages are copied exactly as they are, so text, images and formatting stay identical. Merging does not re-compress or degrade the content.
Can I change the order of the pages?
Yes. Each file has up and down controls so you can arrange the documents in any order before merging. The final PDF follows the order in the list.
Does it add a watermark?
Never. The merged PDF is clean, with no watermarks, stamps or added pages.