Reorder before you merge
Drag and drop files to arrange them in any order. The merged PDF follows your arrangement exactly, page for page.
Merge PDF
Combine PDFs in the exact order you want — fast, free and private.
or drop files here
Files are processed in your browser and never uploaded.
Merge PDF online — free and private
Merge PDF lets you combine two or more PDF documents into a single file in seconds. Add your files, drag them into the order you need, and download one clean, combined PDF. It is perfect for joining reports, contracts, scanned pages, invoices or book chapters into a single document.
Unlike most online PDF mergers, PDF10x never uploads your files to a server. The entire merge happens inside your browser using modern web technology, so confidential documents stay on your device from start to finish.
Why use PDF10x to merge pdf?
100% private by design
Files are processed locally in your browser and never leave your computer. Nothing is uploaded, stored or shared.
No limits that matter
Merge as many PDFs as you need, as often as you need, for free — with no watermarks, signups or daily caps.
How to merge pdf online
- 1
Click “Select PDF files” or drag and drop your PDFs into the upload area.
- 2
Drag the file cards to arrange them in the order you want them to appear.
- 3
Click “Merge PDF” to combine everything into one document.
- 4
Download your merged PDF instantly — it never leaves your device.
Frequently asked questions
Is it safe to merge confidential PDFs here?
Yes. PDF10x merges files entirely in your browser using client-side processing. Your documents are never uploaded to a server, so nobody — including us — can see them.
How many PDF files can I merge at once?
There is no fixed limit. Because processing happens on your own device, the practical limit depends on your computer's memory. Merging dozens of typical documents works without any problem.
Will merging reduce the quality of my PDFs?
No. Merging copies the original pages into a new document without re-compressing them, so text, images and formatting stay exactly as they were.
Can I change the order of the files before merging?
Yes. After adding files, simply drag the file cards into the order you want. The merged document follows that order.
Do I need to install software or create an account?
No. Merge PDF works in any modern browser on Windows, Mac, Linux, Android and iPhone. There is nothing to install and no account required.