Rearrange PDF as Duplex Scan

An app to fix the page order of a double-sided PDF scan from a scanner without a duplex feature. It reorders the pages of a PDF from e.g. (1,3,5,4,2) to the correct order (1,2,3,4,5).

Try out the app on pdf-duplex-scan.vercel.app with two example PDF files: Example 1 and Example 2.

Project highlights

• Drag-and-drop file selection
• Form validation
• Array reordering based on pattern
• User interface for dark and light color schemes
• JavaScript browser validation
• File format validation

Getting started

Check out the app by running the project locally:

1. Clone this repo

   git clone https://github.com/clemensheithecker/pdf-duplex-scan.git
   cd pdf-duplex-scan

2. Initialize the project's dependencies

   npm install

3. Run the development server

   npm run dev

App dependencies

The app uses several light-weight dependencies to run:

• Vite as a fast development server for vanilla JavaScript
• tailwindcss and its @tailwindcss/forms plugin for consistent styling directly in the HTML markup
• pdf-lib to create and modify PDF documents
• downloadjs to download files from JavaScript