More in Organize PDF
About this tool
A closer look at Merge PDF
Merge PDF combines multiple PDF files into one document entirely in your browser. Each file is opened in browser memory, its pages copied in the order you choose, and the result saved locally — nothing is uploaded or stored on a server. You can reorder files before merging and choose whether to keep or remove the source metadata.
Supported files
How to use it
- 1Select PDFs from your device
- 2Reorder files before processing
- 3Download the merged file instantly
What you can use it for
- Combining invoices, receipts or statements into one document for record-keeping.
- Joining separate PDF chapters or pages into a single file before sending or printing.
- Assembling a consolidated PDF from files shared by different teammates.
What to keep in mind
- Password-protected PDFs must be unlocked first with Unlock PDF.
- Duplicate files (same name, size and modified time) are skipped automatically.
- Very large PDFs (over 100 MB) may be slower to process in browser memory.
Related tools
Frequently asked questions
Can I change the order of files before merging?
Yes. Reorder the files in the list before merging — pages are copied into the output in the order shown.
What happens if I add the same PDF twice?
Duplicate files (same name, size and modified time) are skipped automatically so you don't end up with doubled pages.
Does merging upload my documents?
No. Files are opened in browser memory, combined locally, and the merged PDF is saved as a download.
Can I merge password-protected PDFs?
Unlock them first with the Unlock PDF tool, then add the unlocked files to the merge.