Batch PDF Merger — runs in your browser

Merge one PDF into 300 others

Everything happens locally in this tab — files never leave your device. Pick your single PDF, then the batch, choose where it goes, and download all merged files as one zip.

1The single PDF

Click or drop your one PDF here

This file gets added to every merged output

2The 300 PDFs

Click or drop your PDFs (or a .zip of them)

Select up to hundreds of files at once, or one .zip containing them

3Placement

Single PDF goes first Single PDF goes last

Preparing…

Non-PDF files inside a selected .zip are ignored. If a file in the batch fails to merge (corrupt/encrypted PDF), it's skipped and listed above so nothing silently goes missing.