Merge PDF
Combine multiple PDF files into one document instantly.
Files
Output
What this tool does
Upload multiple PDF files and combine them into a single document. You can reorder files before merging. The original files are never modified. Everything runs in your browser — your PDFs are never uploaded to a server.
How to use
- 1Upload two or more PDF files by dragging them in or clicking to browse
- 2Reorder files if needed using the up/down arrows
- 3Click Merge and download the combined PDF
Common use cases
Merge contract appendices
Combine a main contract with its appendices and exhibits into one file for signing.
Combine monthly reports
Merge individual monthly reports into a single quarterly or annual document.
Join invoices
Combine multiple invoices into one PDF for batch submission or record-keeping.
Merge presentation materials
Combine separate PDF slides or handouts into one file for distribution.
Need to extract specific pages from a PDF? Try the PDF Page Extractor.
Why use Doneio
- No signup required — just open and upload
- Your files never leave your browser — nothing is uploaded
- Reorder files before merging
- No watermarks on the output
- Available to use without any signup
Frequently asked questions
Are my files uploaded to a server?
No. The entire merge process runs in your browser. Your PDFs never leave your device.
Is there a file size or count limit?
There is no hard limit. Performance depends on your device and the total size of the files.
Can I reorder the files?
Yes. Use the up/down arrows next to each file to change the merge order before combining.
Does it modify the original files?
No. The original files are untouched. A new combined PDF is created from them.
Is this free to use?
Yes. You can use it right away with no signup required.