Free Tool
PDF Merger
Merge multiple PDF files into one. All processing happens in your browser — no upload needed.
Frequently Asked Questions
Is the PDF merger free?
Yes — completely free with no page limits.
Are my PDFs uploaded to a server?
No. All merging is done in your browser using the pdf-lib library. Files never leave your device.
Can I merge password-protected PDFs?
No — encrypted/password-protected PDFs cannot be processed. Remove password protection first.
Is there a limit on file size or number of PDFs?
Up to 100MB in total. Very large files are slower on older devices because everything runs on your device.
In what order are pages merged?
Pages are merged in the order files appear in the list. Use the arrows to reorder files before merging.