When you upload PDF files, they are processed entirely in your browser using pdf-lib JavaScript library. You can drag and drop to reorder files, then click Merge to combine them into a single PDF. The merged file is generated locally and ready for download.
No. All PDF processing happens completely client-side in your browser. Your files never leave your device, and we do not store, track, or have access to any of your documents. This ensures complete privacy and security.
There is no hard limit on the number of PDFs you can merge. However, very large files (over 50MB each) or merging many large documents may take longer to process depending on your device's performance and available memory.
Yes! Simply drag the handle icon on each file item in the list to reorder them. The PDFs will be merged in the order they appear in the list from top to bottom.
No. The PDF Merger preserves the original quality of all documents. Pages are copied exactly as they are without any compression or quality loss. The merged PDF maintains all text, images, and formatting from the source files.
Currently, password-protected or encrypted PDFs cannot be merged. You will need to remove the password protection from your PDFs before using this tool. We recommend using a PDF unlock tool first if your files are protected.