Merge PDF

Merge multiple PDFs into a single document. Drag files in, reorder them, and download the combined file. Your PDFs are processed entirely in your browser: nothing is uploaded, and there are no page limits or watermarks.

PDF Runs in your browser Works offline once loaded

Private by design: your input is processed on this device and never uploaded. Verify it yourself.

How to use Merge PDF

1Add two or more PDF files.
2Use the arrows to put them in the right order.
3Click Merge and download the combined PDF.

Frequently asked questions

Are my PDFs uploaded to a server?

No. Merging runs in your browser with pdf-lib. You can disconnect from the internet after the page loads and it still works.

Is there a size or page limit?

There is no limit imposed by Toolwright; the practical limit is your device's memory. Merging a few hundred megabytes is usually fine on a modern computer.