LocalPDFTools

Merge PDF

Drop in every PDF you need to combine, drag them into the right order, and merge. Nothing is uploaded to a server — the merge happens in your browser, so your files never leave your device.

100% private — your files never leave your device
Drop PDFs here, or click to browse
Add as many files as you like — you can reorder them below.

Frequently asked questions

Is there a limit on how many PDFs I can merge?
No artificial limit — merge as many files as your browser's memory can hold. Everything runs locally, so there's no server-side file cap.
Will merging add a watermark or require an account?
No. Merging is completely free, with no watermark and no sign up, because the file never touches our servers in the first place.
Can I change the order of the pages before merging?
Yes — drag any file up or down in the list before you merge. Pages are combined in exactly that order.

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