Are my PDFs uploaded to a server?

No. The merge runs in your browser using JavaScript and WebAssembly. Your files are read from disk into the tab's memory and the result is written back to your downloads folder. No copy is transmitted.

How many PDFs can I merge at once?

There is no fixed limit. The practical ceiling is your device's memory — dozens of ordinary documents merge without trouble on a typical laptop.

Will merging change the quality of my pages?

No. Pages are copied object-for-object into the new document, so text remains selectable, fonts stay embedded and images are untouched.

Can I merge password-protected PDFs?

You need to remove the password first. An encrypted document cannot be read without its key, and this tool never asks for one.

Is there a watermark on the result?

No. The output contains only your pages.

Runs in your browser

Merge PDF Files

Combine several PDFs into one document, in the order you choose.

Combining PDFs is usually the moment people hand a contract, a payslip or a medical record to an unknown server. This merge tool does the whole job with the PDF engine already running inside your browser: drop the files in, drag them into the order you want, and download one combined document. The files are read from disk into your tab's memory and never sent anywhere.

Drop your PDF files here

Add two or more PDFs, then put them in the order you want.

Choose files

Files stay on this device — nothing is uploaded.

Processing Happens in Your Browser

Processing happens locally on your device. Your file does not need to be uploaded to our processing server.

Works offline after load No account, no storage

How it works

1
Add your PDFs
Drag files onto the drop area or use the file picker. Add as many as you need.
2
Set the order
Move files up or down until the sequence matches the document you want.
3
Merge
Press merge — pages are copied one by one into a new document inside the tab.
4
Download
Save the combined PDF straight to your device. Nothing is stored afterwards.

Features and benefits

Order you control
Reorder files before merging instead of relying on filename sorting.
Original quality
Pages are copied, not re-rendered, so text stays selectable and vectors stay sharp.
No account, no queue
There is no upload step, so there is no waiting room and no daily limit.
Works offline
Once the page has loaded, the merge itself needs no network connection at all.

Supported formats and limits

PDF 1.3 through 2.0, including files produced by Word, Pages, Google Docs and scanners.

Everything runs inside your browser tab, so the practical ceiling is your device's available memory rather than an upload limit. Documents up to roughly 100 MB work comfortably on a modern laptop; very large files are best handled a few at a time, and closing the tab clears all of it instantly.

Frequently asked questions

Keep your documents on your own device

Every tool here works the same way: local processing, no upload, no account. Browse the full set or read exactly how the in-browser engine works.

Browse all tools How the technology works

Processing Happens in Your Browser

How it works

Add your PDFs

Set the order

Merge

Download

Features and benefits

Order you control

Original quality

No account, no queue

Works offline