PDF Merger - Free Online Tool | PivaBox

Merge multiple PDF files into one document

How to Use PDF Merger

1. Click Add PDF Files to select two or more PDF files from your device
2. The files will be listed in the order they will be merged — use the ✕ button to remove any file
3. Click Merge to combine all PDFs into a single document, which will download automatically

Frequently Asked Questions

Is PDF Merger free?

Yes, PivaBox PDF Merger is completely free to use. There are no charges, subscriptions, or hidden fees. All processing runs locally in your browser.

Are my PDF files uploaded to a server?

No. All PDF merging happens entirely in your browser using <code>pdf-lib</code>. Your files never leave your device, ensuring your documents stay private and secure.

Is there a page or file size limit?

The tool runs entirely in your browser, so the practical limit depends on your device's available memory. For most modern computers, merging 5-10 PDFs with several hundred total pages works without issues. Very large files (over 100 MB each) may cause performance issues depending on your device.