PDF Merger

A simple, responsive web application to merge multiple PDF files into a single PDF, sorted alphabetically by filename. Built using vanilla HTML, CSS, and JavaScript with the pdf-lib library.

Features

• Drag & drop or file selection of multiple PDF files
• Automatic sorting of selected files by filename (A–Z)
• Preview list with option to remove individual files
• Responsive design for mobile, tablet, and desktop views
• Instant merge and download of the combined PDF
• Status indicator for merge progress

Prerequisites

• A modern web browser (Chrome, Firefox, Edge, Safari)
• Internet connection to load the pdf-lib library via CDN

File Structure

pdf-merger/
├── index.html    # Main HTML page
├── style.css     # Stylesheet for layout and responsiveness
└── script.js     # JavaScript logic for file handling and PDF merging

Installation & Usage

1. Clone or download the repository:

   git clone https://github.com/yourusername/pdf-merger.git
   cd pdf-merger

2. Open index.html in your preferred browser:

   • Double-click the file, or

   • Run a local HTTP server (recommended for drag-and-drop consistency):

     # Using Python 3.x
     python -m http.server 8000
     
     # Open http://localhost:8000 in your browser

3. Select PDF files:

   • Drag & drop them into the drop-zone area, or
   • Click the drop zone to open the file dialog and select PDFs.

4. Reorder & remove files as needed using the file list controls.

5. Click "Merge & Download PDF" to combine and download the merged document.

Customization

• Sorting behavior: Change the localeCompare options in updateFileList() for different collation rules.
• Styling: Modify style.css to update colors, fonts, or layout breakpoints.
• Library: Swap out pdf-lib for another client-side PDF library if desired.

Troubleshooting

• If the merge operation fails, check the browser console for errors.
• Ensure all selected files are valid PDF documents.
• On iOS/Safari, drag-and-drop may behave inconsistently; use the file selector click instead.

License

This project is released under the MIT License. See LICENSE for details.

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Happy Merging!