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Interleave

Merge front and back scans into order.

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Drag a PDF here, or click to choose
Drag a PDF here, or click to choose

How to interleave front and back scans

  1. Drop the front-side scan PDF into the "Front scan" dropzone.
  2. Drop the back-side scan PDF into the "Back scan" dropzone, and check "Back scan is in reverse order" if your scanner produced it that way.
  3. Click "Interleave" to download the combined, correctly ordered PDF.

FAQ

Are my files uploaded to a server?

No — everything runs locally in your browser via WebAssembly; your files never leave your device.

What does "Back scan is in reverse order" mean?

Many scanners feed the back sides in reverse when scanning a stack two-sided with a single-sided feeder. Checking this option flips the back-scan order so pages interleave correctly as front 1, back 1, front 2, back 2, and so on.