Merge PDF
Combine several PDF files into a single document, in the exact order you choose.
Merge PDF online, free and private
Merging PDFs is the everyday job of stitching several documents into one clean file — a cover letter in front of a résumé, a stack of scanned invoices, or a report assembled from pieces different people wrote. Instead of emailing five attachments, you hand over a single, ordered PDF that opens the same way on every device.
PDFToolz does the whole thing inside your browser. Your files are read into memory, combined locally, and offered back as a download. Nothing is uploaded to a server, so even confidential contracts and financial statements never leave your computer.
How to merge pdf in your browser
- 1
Add your PDF files
Click ‘Select PDF files’ or drop them onto the page. You can add as many as you like, and come back for more with the ‘+ Add more’ button.
- 2
Put them in the right order
Each file appears as a numbered thumbnail. Use the ‹ and › arrows to move a document earlier or later — the number badge shows exactly where it will land in the final PDF.
- 3
Merge and download
Press ‘Merge PDFs’. The pages are copied into a single document in your browser and the finished file is ready to download in seconds.
Why use PDFToolz for this
Your files stay private
Merging happens with client-side JavaScript. Because the documents are never transmitted, there is no server copy to leak, cache, or subpoena — a real advantage for legal, medical, and financial paperwork.
Original quality, untouched
We copy the underlying page objects rather than re-rendering them, so text stays selectable, fonts stay crisp, and images keep their original resolution. The merged file is a faithful combination, not a screenshot.
No page or file limits
Combine two files or two dozen. The only practical limit is your device’s memory, which comfortably handles the large reports and multi-hundred-page bundles most people need to merge.