How to use this PDF Merger:

1. Select multiple PDF files using the button above or by dragging and dropping
2. Review the preview of your selected PDF files
3. Use the "Sort Files" button to rearrange the order of pages
4. Click "Merge PDFs" to combine all files into one PDF document
5. After successful merging, click "Download Merged PDF" to save your file

Note: All processing happens in your browser - your files are never uploaded to any server.