CodeASystem PDF tools

Interleave & sort double-sided scans.

Combine separate odd and even page scans or split a single scan stack into the correct alternating page sequence locally.

Double-Sided Scan Interleave

Combine separate odd and even page scans into a correctly sequenced single PDF.

1. Front Sides / Odd Pages (1, 3, 5...)Choose Front Scanor drag file here

2. Back Sides / Even Pages (2, 4, 6...)Choose Back Scanor drag file here

Reverse back stack order (recommended for standard feeder scanner stacks scanned in reverse: 6, 4, 2)

Processing happens entirely inside your browser. No files are uploaded to any server.

How it works

Duplex scan merging. Zero uploads.

Non-duplex document scanners often require scanning all front sides, then flipping the entire stack to scan all back sides. This tool matches each front page with its corresponding back page and reverses the back stack if needed—entirely in your browser.

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