Merge PDF
Combine two or more PDFs into a single file in seconds. Drag in your documents, arrange them in the right order, and download one merged PDF — all processed locally, so sensitive documents never leave your device.
Drop PDF files here or click to choose
Add two or more PDFs — merged locally, never uploaded
How it works
The tool uses pdf-lib, a client-side PDF library. Each file is parsed in your browser, its pages are copied one by one into a new PDF document in the order you set, and the result is re-saved and offered as a download. No server is involved at any step.
Frequently asked questions
Is there a file size or page limit?
No hard limit — everything depends on your device's memory. Merging dozens of typical documents works smoothly.
Are my PDFs uploaded?
Never. The merge happens entirely in your browser with pdf-lib; your files don't touch any server.
Can I change the page order?
Yes — use the ↑ ↓ buttons on each file to reorder before merging. Pages stay in their original order within each file.