Alternate & Mix PDFs Online Free

Upload 2 or more PDF files and interleave their pages (e.g., page 1 from PDF1, page 1 from PDF2, page 2 from PDF1, etc.). Perfect for combining question papers with answer keys!

How to Alternate & Mix PDFs (Step by Step)

  1. Click "Choose PDF Files" and select 2 or more PDF documents from your device.
  2. The selected files will appear below with file names and a Remove button.
  3. Pages will be mixed in the order you uploaded them: first page of each PDF, then second page of each, and so on.
  4. Click "Alternate & Mix PDFs" — processing starts immediately in your browser (no data uploaded).
  5. Your new interleaved PDF will download automatically as mixed-alternate.pdf.

100% Free · No registration · Works on mobile & desktop · Files are processed locally — nothing is stored on our servers.