Combine unlimited PDF files into one document with drag-and-drop reordering. Preserve bookmarks, add page numbers, optimize file size. Choose sequential or interleaved merging modes - completely free and secure!
Select multiple PDF files to merge
Support for PDF documents • No file size limit • Privacy protected
Configure your merge options
Professional PDF merging with advanced customization options
Merge unlimited PDF files into a single document with drag-and-drop functionality.
Easily reorder PDF files by dragging, or sort automatically by name or file size.
Lightning-fast merging powered by client-side processing for maximum speed.
Choose sequential merging or interleaved page-by-page combination modes.
Maintain PDF bookmarks and structure when merging multiple documents.
Automatic file size optimization to create smaller merged PDF documents.
All merging happens locally in your browser - no files are uploaded to servers.
Choose your output filename and customize merge settings to fit your needs.
No hidden costs, watermarks, or registration required.
Works perfectly on desktop, tablet, and mobile devices.
No internet connection required after page loads.
Get answers to common questions about our PDF merge tool
There's no limit to the number of PDF files you can merge. However, for optimal performance, we recommend merging up to 50 files at once. For larger batches, you can merge in multiple steps.
Sequential merge combines files one after another (File1 pages, then File2 pages, etc.). Interleaved merge alternates pages from each file (Page1 from File1, Page1 from File2, Page2 from File1, etc.).
Yes! You can drag and drop files to reorder them manually, or use the automatic sorting options to sort by filename or file size before merging.
Yes, when the "Preserve bookmarks" option is enabled, all bookmarks, internal links, and document structure will be maintained in the merged PDF.
There's no strict file size limit, but very large PDFs (over 100MB) may take longer to process. The tool works entirely in your browser, so available memory may affect performance with extremely large files.
No! All PDF merging happens locally in your browser using JavaScript. Your files never leave your device, ensuring complete privacy and security.
Yes! Our PDF merge tool is completely free with no hidden costs, watermarks, or registration required. All features are available without any limitations.
Absolutely! Our PDF merge tool is fully responsive and works perfectly on smartphones, tablets, and desktop computers. The interface adapts to your screen size for optimal usability.