Merge PDF
Combine multiple PDF files into one — entirely in your browser. Your files never leave your device.
Merging PDFs is the most common document chore there is: you have a few separate files — a cover letter, a contract, a scanned form — and you need them as a single PDF. thepdf.tools merges them entirely inside your browser. Nothing is uploaded, so even sensitive contracts and medical records stay on your device.
Add your files in the order you want them, and we combine every page into one clean PDF you can download immediately. There is no account, no watermark, and no file-size paywall — the only limit is your device's available memory.
Frequently asked questions
Do my files get uploaded to a server?
No. Merging runs entirely in your browser using JavaScript. Your files never leave your device and are never sent anywhere.
Is there a file size or count limit?
There is no artificial limit. Very large files are constrained only by your device memory, which is most noticeable on phones.
Can I control the order of the merged pages?
Yes — files are merged in the order you add them.