Merge PDF
Runs in your browser. Your files never leave your device.
How we keep your files private
How to use Merge PDF
- Add the PDF files you want to combine.
- Check the order they were added in.
- Download the merged PDF.
Common uses
- Combining scanned pages into one file.
- Joining invoices or reports.
- Packing application documents into a single PDF.
About this tool
Combine several PDF files into one, in the order you add them. Pages are copied with the open-source pdf-lib library inside your browser, so confidential documents are never uploaded. Password-protected PDFs may not open, and very large files depend on your device's memory.
Worked example
Merging a 3-page contract and a 2-page appendix gives one 5-page PDF, with the pages in the order you list the files. Drag to reorder before merging.
Common problems and fixes
- The file will not open.
- Password-protected or damaged PDFs cannot be merged. Remove the password first.
- The merged file is huge.
- Merging keeps each file as it is. Compress the result if you need it smaller.
- Pages are in the wrong order.
- Reorder the files before merging: pages follow file order.
Next steps
Frequently asked questions
Is there a page limit?
No fixed limit; very large files depend on device memory.
Can I reorder files?
Files are merged in the order added; clear and add them again in the order you want.
Does it work with protected PDFs?
Password-protected PDFs may fail to open.
Are my files uploaded to a server?
No. Everything runs inside your browser on your own device, so your files and text are never sent anywhere.
Is it really free?
Yes. There is no sign-up, no watermark and no limit on how often you use it.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers. Very large files may be slow on older phones.