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Merge PDF
OrganizeCombine two or more PDF files into a single document in any order. 100% private — your files never leave your browser.
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Drop PDFs here or click to browse
Select two or more PDF files
🔒 100% Private
Files never leave your browser. No upload to any server.
⚡ Instant
Processing runs locally on your device. No queues, no waiting.
🆓 Free & Open Source
No signup, no watermarks, no limits. MIT-licensed code.
Frequently asked questions
Is this PDF merger really free?
Yes. Unlimited use, no signup, no watermarks. The site is open source and hosted on Cloudflare Pages.
Are my files uploaded?
No. All merging happens in your browser using pdf-lib. Your files never touch a server.
Is there a file size limit?
Only your device memory. Most modern computers handle hundreds of MB easily.
Can I reorder PDFs before merging?
Yes — drag the items in the list, or use the arrow buttons to reorder.