PDF Merger: Easily Combine Multiple PDFs Into One

Quickly merge multiple PDF files (such as reports, scanned documents, contracts) into a single, ordered PDF document. The entire process is completed locally on your computer, safe and efficient.

⚡️ Quick Start: Merge Several PDFs

1. Click the file selection area, or directly drag several PDF files into the window.
2. In the file list, drag to adjust their merge order.
3. Specify an output folder and filename for the merged new file.
4. Click the "Execute" button. After the command completes, you'll get a merged PDF file.

🤔 When Should I Use It?

• You have several scanned contracts or invoices that need to be merged into one file before sending.
• You wrote a report where the cover, main text, and appendix are three separate PDFs that need to be integrated.
• You want to merge multi-chapter e-books or course materials into one complete document for easier reading and management.
• You want to convert several images to PDF separately, then merge them together.

⚙️ Options and Settings

File List and Sorting

This displays all PDF files you've added. The final merge order will strictly follow this list from top to bottom.

• Drag Sorting: You can hold any file and drag it up or down to change its position in the list.
• Remove Files: If you added the wrong file, you can click the remove button next to it.

Output Settings

• Output Filename: You need to specify a save path and filename for the merged new file. By default, it will be saved in the same directory as the first PDF.

Click to view: Dependency Installation and Common Issues

Dependency Installation

This tool depends on the pdfly Python package. You need to install Python and pip on your Mac first, then run this once in the terminal:

pip install pdfly

If you haven't installed Python yet, we recommend installing it via Homebrew: brew install python.

Common Issues (FAQ)

Q: What if the order of the merged file is wrong? A: Please drag the files in the file list to arrange them in your desired final order. The first file in the list will be page 1 of the final PDF.

Q: Can I merge encrypted PDF files? A: No. If your PDF files are password-protected (whether open password or permission password), pdfly will not be able to read them, and the merge will fail. Please use other tools to remove PDF passwords first.

Q: Will the merged file become very large? A: The merged file size roughly equals the sum of all original file sizes. If you think the merged file is too large, you can use our PDF Compressor (pdfly) to reduce its size.

Technical Notes

• Core Tool: Based on the powerful open-source Python library pdfly, which is the official command-line tool for PyPDF2.
• Privacy Security: All file merge operations are performed locally on your computer, and none of your files are uploaded to network servers, ensuring absolute privacy protection.
• System Requirements: macOS 10.12 or higher, with Python and pdfly installed.

Related Tools

In the CmdWise app market, you can also find other PDF processing tools:

• PDF Compressor (pdfly): Reduce PDF file size
• Image to PDF Converter (pdfly): Convert multiple images into a single PDF file
• PDF Splitter (pdfly): Split a large PDF into multiple small files