Combine two PDFs by alternating pages between them.
Alternate-mix interleaving merges two PDFs by alternating their pages — page 1 from doc A, page 1 from doc B, page 2 from doc A, page 2 from doc B, and so on. This is used when a double-sided document has been scanned as two separate single-side runs.
Office workers combine front-side and back-side scans of double-sided documents into a single correctly ordered PDF. Archivists interleave odd and even page batches from duplex scanning operations. Anyone who scans documents one side at a time benefits from alternate mixing.
Upload the two PDFs (front pages and back pages) and the tool merges them in alternating page order. Optionally reverse the second document's order if it was scanned last-page-first. Processing runs in your browser.
Your files never leave your browser. No account required, no server uploads — just fast, local processing. This is what it means to interleave PDF pages without uploading.
Easily merge single-sided scanner outputs into a proper document sequence.
The tool will just append the remaining pages at the end automatically.
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