Merge PDF Files Online — Free
Combine two or more PDFs into a single document. Free, private, and everything happens in your browser — your files never leave your device.
Drag & drop your PDFs here
or click to browse — files stay on your device
Files never leave your deviceHow to merge PDF files
- Drop two or more PDF files into the box above (or click to browse).
- Use the ↑ and ↓ arrows to arrange them in the order you want.
- Click Merge PDFs — your combined file downloads automatically.
About this free PDF merger
PDFPax's PDF merger combines several PDF files into one document right in your browser. There is nothing to install and nothing to upload: your files never leave your device, which keeps sensitive documents — contracts, reports, medical records — completely private. Add two or more PDFs, rearrange them into the order you want, and merge with one click. The tool joins the pages in exactly the order shown in your list. It handles everyday PDFs without fuss: reports, invoices, scanned pages, contracts, and application documents. Everything runs client-side using the open-source pdf-lib library, so the page keeps working offline once it has loaded and your files never queue on a remote server. Merging is free with no watermarks, no page limits, and no account. Password-protected files can't be opened by browser tools, so remove the password before merging. For very large sets of files, a desktop with decent memory gives the fastest results.
Frequently asked questions
Can I control the order of the pages in the merged PDF?
Yes. The merged file follows the order of the list on this page, top to bottom. Use the ↑ and ↓ arrows next to each file to rearrange them before clicking Merge PDFs.
What happens with password-protected PDFs?
Password-protected files cannot be opened by browser-based tools. Remove the password from the file first, then merge it here.
Is there a limit on how many PDFs I can merge?
No hard limit. Everything runs in your browser's memory, so very large sets of files — or very large files — may slow down low-end devices. In practice, a dozen typical documents merge in seconds.