Is my file uploaded to a server?

No. This tool runs entirely in your browser via WebAssembly — your file never leaves your device. You can verify this in your browser's DevTools Network tab.

Can I reorder the PDFs before merging?

Yes — drag the files into any order before merging.

Is there a limit on how many PDFs I can merge?

No. Local tools are unlimited and free, with no account required.

Merge PDF

Combine multiple PDFs into a single file. Drag to reorder.

Local processing — your files never leave your browser