Combine multiple PDFs into one file, in the order you want. 100% browser-side — your documents never leave your device.
No. Merging runs entirely in your browser with pdf-lib. You can even disconnect from the internet after the page loads — it still works.
No hard limit. Very large files depend on your device memory; hundreds of pages are fine on any modern laptop or phone.
Yes. Use the up/down arrows on each file row — pages are appended in the listed order.
PDFs with an open password cannot be read. Remove the password first, then merge.