Merge PDF files
Combine multiple PDFs into a single document. Drag to set the order, then download — your files never leave your device.
- Files never uploaded
- Free, no sign-up
- Works on any device
- Works offline
Drop your files here
or drag and drop · Choose 2 or more PDFs
Stays on your device — nothing is uploaded
How to merge PDF
Add your PDFs
Drop two or more PDF files, or tap “Choose files”.
Put them in order
Drag the files (or use the arrows) into the order you want.
Merge and download
Tap “Merge PDF” and save the combined file.
About Merge PDF
When to merge PDFs
Merging is handy for sending one attachment instead of many: job applications (cover letter, CV and certificates), expense reports with receipts, or contracts with their appendices.
Good to know
Password-protected PDFs must be unlocked first with the Unlock PDF tool. Very large merges (hundreds of pages) depend on your device’s memory; if your browser struggles, merge in smaller batches.
Your files never leave your device
Most online PDF sites upload your documents to their servers. DocuVault doesn’t. Everything happens inside your browser, so there is nothing for anyone to see, store or leak.
Check it yourself
Use a tool once, then turn off your Wi-Fi or switch to airplane mode and use it again — it still works. Developers can watch the Network tab: no file is ever sent.
Step 1
You choose a file
Your browser opens it directly from your device — like opening it in an app.
Step 2
Your device does the work
The processing code runs inside this browser tab. No server ever receives your file.
Step 3
You save the result
The new file goes straight to your downloads. Close the tab and everything is gone.
Frequently asked questions
Is it safe to merge confidential PDFs here?
Yes. The files are read and combined by your own browser. Nothing is uploaded to a server, so no one else can see them.
Is there a limit on the number of files or pages?
There is no fixed limit. The only limit is your device’s memory, which comfortably handles hundreds of pages on most computers and phones.
Will merging reduce quality?
No. Pages are copied as they are, so text stays sharp and searchable and images are not recompressed.
Can I merge a password-protected PDF?
Unlock it first with the Unlock PDF tool (you will need the password), then merge.