Frequently Asked Questions
Click or drag to add PDF files, arrange them in the desired order using the arrow buttons, then click 'Merge'. The combined PDF downloads instantly.
There is no hard limit. However, very large files (100MB+) may be slow as everything is processed in your browser's memory.
No. All PDF processing happens entirely in your browser using pdf-lib. Your files never leave your device.
Yes. Use the up/down arrows next to each file to change the order. Files are merged in the order shown.
Password-protected PDFs cannot be merged directly. Use our Unlock PDF tool first to remove the password, then merge.