Yes, absolutely! Our PDF Merge tool uses PDF-LIB library to process all files locally in your browser. Your PDFs never leave your computer and are not uploaded to any server. This ensures complete privacy and security for your documents.

You can merge as many PDF files as you need! There’s no hard limit, but for optimal performance we recommend merging up to 20 files at a time. Each individual file should be under 50MB for smooth processing.

Yes! You can easily reorder your PDFs before merging:

• Use the up/down arrows to move files individually

• Drag and drop files to rearrange them

• The merge order is exactly the order shown in the file list

The merge process preserves the original quality of all PDFs. Text remains crisp, images maintain their resolution, and all formatting stays intact. The merged PDF will have the same quality as your original files.

Password-protected PDFs need to be unlocked before merging. Please remove the password protection from your PDFs using appropriate software first, then use our tool to merge them. We cannot process encrypted PDFs due to security restrictions.

Yes! The PDF Merge tool is fully responsive and works on:

• Smartphones (iOS & Android)

• Tablets

• Desktop computers

• Laptops

For best results on mobile, we recommend merging fewer files (3-5) at a time.

Each individual PDF file should be under 50MB. If you need to merge larger files, consider:

• Using our PDF Compressor tool first

• Splitting large PDFs into smaller parts

• Using desktop software for very large files

No! The merged PDF is completely watermark-free. Our tool is 100% free to use with no hidden limitations, no watermarks, and no registration required. You get a clean, professional merged PDF.