Interleave the pages of two PDFs
If your scanner produced one file with the front pages and another with the backs, drop both in and the tool will interleave them 1, 1, 2, 2, 3, 3. If the second file was scanned in reverse, tick the reverse option.
A scanner without a duplex feeder makes you scan one side of the stack, then flip it and scan the other. You end up with two files: pages 1, 3, 5, 7 in one and pages 2, 4, 6, 8 in the other — and because you flipped the stack, the second file is usually in reverse order, 8, 6, 4, 2.
This tool weaves them back together in the right sequence. Tick the reverse box for the second file and the result reads 1, 2, 3, 4 as it should.
Always open the merged file and look at the first four pages before you send it anywhere. If page 2 is the back of a different sheet, you needed the reverse option — or you needed it off. It takes ten seconds to check and saves resending a document to an office.
No problem — the leftover pages are added at the end.
Tick the 'reverse the second file' option for the backs.
No. It is interleaved in your browser.
The extra pages are added at the end. That normally means a sheet was missed on one pass.
Because flipping the stack reverses the order. That is normal, and the reverse option is there for it.
Yes — it simply takes one page from each file in turn.
🔒 Everything on this page happens inside your browser. Your file is never uploaded to a server.