Merge PDF lets you combine two or more PDF files into a single document in the order you choose. It works entirely in your browser, so you can merge PDF files quickly and privately without uploading anything.
How to merge PDF files
- Click "Choose PDF files" or drag and drop your PDFs into the box.
- Arrange the files in the order you want using the up and down arrows.
- Click "Merge PDF" to combine them into one file.
- Click "Download" to save your merged PDF.
Why use ZentaPDF Merge PDF?
Frequently asked questions
Are my files uploaded to a server?
No. ZentaPDF processes your files inside your own browser using JavaScript. Nothing is uploaded, so nobody else can see your documents — not even us.
How many PDF files can I merge at once?
There is no fixed limit. You can merge as many files as your device memory allows — usually dozens of files or several hundred pages on a normal computer or phone.
Will merging change the quality of my PDF?
No. Pages are copied exactly as they are, so text, images and fonts keep their original quality.
Can I merge password-protected PDFs?
Encrypted PDFs need to be unlocked first. Use our Unlock PDF tool (coming soon) with the password you know, then merge the files.
Is it really free? Do you add a watermark?
Yes, it is completely free with no sign-up, no watermark and no daily limits. The site is supported by a few non-intrusive ads.