Merge PDF
Combine multiple PDF files into one document entirely in your browser. Files never leave your device.
Your files
How to merge pdf
- 1Click the drop zone or browse to select two or more PDF files.
- 2Use Up/Down to reorder files if needed.
- 3Press Merge — processing runs locally in your browser.
- 4Download the combined PDF. Nothing was uploaded.
FAQ
Are my PDFs uploaded to a server?+
No. LocalPDF merges files with JavaScript (pdf-lib) inside your browser. Files never leave your device.
Is there a file size or page limit?+
Limits come from your device memory, not our servers. Most personal documents (tens of MB) work fine.
Do I need an account?+
No account, no email, no watermarks on free merges. Open the page and merge.
Does merge work offline?+
After the page loads once, the merge logic can run offline because all processing is client-side.
Why use a no-upload PDF tool?
Most free PDF websites ask you to upload contracts, IDs, and invoices to unknown servers. Even if they delete files later, the transfer itself is a privacy risk — and some sites inject watermarks or hard limits.
LocalPDF runs entirely in your browser with open libraries. Your file is never posted to our origin. That also means lower cost for us, so the core tools can stay free while we expand.
Looking for another tool? Try Split PDF, Rotate PDF, or Watermark PDF.