Are my files uploaded?

No. All processing happens locally in your browser (client-side).

Can it handle large files?

Hundreds of MBs may work, but practical limits depend on your device memory.

pdf-lib copies existing page objects, so merging does not re‑render or downscale content.

Free · Client‑side · No data stored

Combine multiple PDFs without uploading. Reorder pages, then merge & download in one click.

Drop PDFs here

or

Choose Files

File listDrag to reorder

Output filename If the file has a password, it will not be merged. Please check the file.