Merge PDF Files — Private, In Your Browser
Combine multiple PDFs into one file without uploading anything.
✓ updated June 2026
Merging happens entirely in your browser — your PDFs are never uploaded to any server. Password-protected PDFs can't be merged.
Combine two or more PDFs into a single file — contracts, scans, invoices, chapters — without your documents ever leaving your computer. Unlike upload-based merge sites, everything here runs locally in your browser, so it works on confidential files, needs no account, has no file-size tricks, and is exactly as private as opening the file yourself. Add files, drag them into order, merge, download.
How to use the PDF Merge
- Click the file picker and add two or more PDF files.
- Reorder them with the ↑ ↓ buttons — the list order is the merge order.
- Click Merge & download to save the combined PDF.
Frequently asked questions
Are my PDFs uploaded to a server?
No — that's the point of this tool. The merging runs in your browser with JavaScript (pdf-lib); your files never leave your device, so it's safe for contracts, medical and financial documents.
Is there a file size or page limit?
Only your device's memory. Typical documents merge instantly; very large scanned files (hundreds of MB) depend on your browser's available RAM.
Can I merge password-protected PDFs?
No — encrypted PDFs can't be read without the password. Remove the password first (e.g. print-to-PDF from the opened file), then merge.
Does it preserve quality?
Yes. Pages are copied losslessly into the new document — no re-rendering, no compression, no watermarks.