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

There is no fixed cap; the practical limit is your device's memory, since everything is held locally rather than on a server.

Will merging change the quality of my pages?

No — pages are copied as-is into the new file, so text stays sharp and selectable and images keep their original resolution.

Can I reorder the documents before combining them?

Yes. Drag each file up or down in the list and the combined PDF follows that exact sequence.

Do you keep a copy of the files I join?

We cannot — the merge runs entirely in your browser tab, so there is nothing for us to store or see.

Stays on your device

Merge PDF files free, right in your browser

To merge PDF files here, drop two or more documents below, drag them into the order you want, and download a single combined PDF. The whole join happens inside this browser tab using your own computer, so the pages you are stitching together are never sent to a server and never uploaded anywhere.

Add the PDFs you want to join, reorder them by dragging, then download one combined file.

Drag PDF files here to combine them

Add two or more PDFs. Drag the rows to set the order.

Choose files

How this works

What happens when you use this tool

When you choose files, this page reads their bytes locally and uses the open-source pdf-lib library to copy every page from each document into one new PDF, in the order you set.

Because the joining runs in a background worker thread on your machine, even a large batch of contracts or scans stays responsive and nothing leaves the tab.

What this tool can't do

It does not unlock password-protected files: If one of your PDFs is encrypted with an open password, this tool cannot read its pages and will tell you which file it was — it will not break or remove the password for you.
Form fields and signatures may flatten: Interactive form fields and some digital signatures can change or stop working once pages are copied into a new document; if a signed page must stay valid, keep that original.

FAQ

Frequently asked questions

Is there a limit on how many PDFs I can merge?: There is no fixed cap; the practical limit is your device's memory, since everything is held locally rather than on a server.
Will merging change the quality of my pages?: No — pages are copied as-is into the new file, so text stays sharp and selectable and images keep their original resolution.
Can I reorder the documents before combining them?: Yes. Drag each file up or down in the list and the combined PDF follows that exact sequence.
Do you keep a copy of the files I join?: We cannot — the merge runs entirely in your browser tab, so there is nothing for us to store or see.