No. FyleTools processes everything directly in your browser using WebAssembly technology. Your files never leave your device, making it completely safe for sensitive documents.

There is no fixed limit. Since processing happens in your browser, the practical limit depends on your device's available memory. Most devices handle dozens of files without issues.

No. The merge operation combines the original PDF data without re-encoding. All text, images, fonts, and formatting are preserved exactly as they were.

Yes. Use the arrow buttons to reorder files before merging. For more advanced page manipulation, try our Organize PDF tool which lets you reorder individual pages.

There is no fixed limit. The practical maximum depends on your device's memory. Most devices handle merging 20+ documents without issues.

Basic PDF structure is preserved during merging. Complex features like interactive forms may need to be verified after merging.

Yes. Upload PDFs from your phone's file manager and merge them directly in your browser. No app installation required.

Protected PDFs must be unlocked first. Use our Unlock PDF tool to remove the password, then merge the unprotected files.