Are my PDF files uploaded to a server?

No. All merging happens inside your browser and files are never sent anywhere.

Is there a limit on how many files I can merge?

There is no limit. However, a very large number of files or very big files may slow down depending on your browser's memory.

Can I merge password-protected PDFs?

No. Protected documents cannot be opened even locally, so merge an unlocked copy instead.

How large is the merged file?

Roughly the sum of the inputs. If scans make it large, run it through the Compress PDF tool after merging.

🔗 Merge PDF

Combine several PDFs into a single file, in the order you want.

Drop your PDF files here

Click or drag two or more files

🔒 Uploaded files are never sent to a server — processed entirely in your browser

How to merge PDF

Drag the PDFs you want to combine onto the area above, or click to select them.
Reorder them with the ↑↓ buttons.
Press Merge PDF and the combined file downloads automatically.

Before you merge

Item	Details
Input	Multiple PDFs — drag or click to select several at once
Merge order	Files join in upload order; reorder with the ↑↓ buttons
Output	Combined into a single PDF that downloads immediately
Limitation	Password-protected PDFs cannot be opened — unlock them first

💡 When you need to combine PDFs

Scanned contracts, reports split across teammates, invoices received over time — scattered files are a hassle to open, send and print. Merge them into one and you open, send and page-number everything at once. No install or sign-up, right in your browser.

🔢 Get the order right first: The result follows the order you add the files. For a cover, body and appendix flow, set the order with the ↑↓ buttons before merging.
🗜️ Compress first if it's large: Merging scanned PDFs easily reaches tens of MB. If you might exceed a 25MB email limit, compress the PDF first, then merge.
🔒 Safe for sensitive files: Files are never sent to a server — merging happens only in your browser. Even contracts and ID scans stay private.

📌 Where is merging PDFs useful?

Bundling contracts and proposals — combine a cover page, body and appendix into one file to send.
Organizing scans — stitch multiple scanned PDFs together in order into a single document.
Consolidating invoices and receipts — group separate files by month for easy record-keeping.
Compiling team reports — merge PDFs from each teammate in order into a final version.

✨ How to merge without mixing up the order

The upload order becomes the merge order — arrange your files in the final order before uploading.
You can always reorder files afterward with the ↑↓ buttons in the list.
Naming files 01, 02, etc. before merging makes it harder to lose track of the order.

🔒 What if the merged file gets too large?

Combining several files adds up their size. Scan-heavy PDFs in particular can reach tens of MB once merged, and if that exceeds an email attachment limit (often 25MB), use Compress PDF before or after merging to bring the size back down.

📖 Guide: How to Merge PDFs — 3 Methods Compared →

Frequently asked questions

Are my files uploaded to a server?: No. All merging happens inside your browser and files are never sent anywhere.
Is there a limit on the number of files?: There is no limit. That said, very many or very large files may slow down depending on your browser's memory.
Can I merge password-protected PDFs?: No. Protected documents cannot be opened even locally, so merge an unlocked copy instead.
How large is the merged file?: Roughly the sum of the inputs. If scans make it large, run it through the Compress PDF tool after merging.