Merge Odd and Even PDFs

This tool helps you combine two PDF files—one containing odd pages and one containing even pages—into a single, properly interleaved PDF document. This is common when scanning two-sided documents using a scanner without a duplexer/ADF that handles dual-sided scanning automatically.

Prerequisites

• PowerShell (Standard on Windows)
• iTextSharp.dll: The script attempts to download this automatically if not found.

Usage

1. Open PowerShell.
2. Navigate to this directory.
3. Run the script:

.\Merge-OddEvenPdf.ps1 -OddPdfPath "C:\Path\To\Odd.pdf" -EvenPdfPath "C:\Path\To\Even.pdf" -OutputPdfPath "C:\Path\To\Merged.pdf"

Parameters

• -OddPdfPath: Path to the PDF containing pages 1, 3, 5, etc.
• -EvenPdfPath: Path to the PDF containing pages 2, 4, 6, etc.
• -OutputPdfPath: Path where the final PDF will be saved.
• -ReverseEven: (Optional) Use this switch if your even pages were scanned in reverse order (e.g., 6, 4, 2) which often happens when flipping a stack of pages.

Example

# Standard merge
.\Merge-OddEvenPdf.ps1 -OddPdfPath ".\odd.pdf" -EvenPdfPath ".\even.pdf" -OutputPdfPath ".\result.pdf"

# Merge with reversed even pages
.\Merge-OddEvenPdf.ps1 -OddPdfPath ".\odd.pdf" -EvenPdfPath ".\even.pdf" -OutputPdfPath ".\result.pdf" -ReverseEven