How to merge PDF files
- Click the box above and select two or more PDF files (or drag them in).
- Drag the items in the list to set the order they'll appear.
- Press Merge PDF and your combined file downloads instantly.
Why use File Format Converter to combine PDFs?
Most online merge tools upload your documents to a remote server. File Format Converter does everything locally with the open-source pdf-lib engine, so your files never leave your computer. There are no watermarks, no email walls, and no file-size caps beyond your own device.
Frequently asked questions
- Is it safe to merge PDFs here?
- Yes — files are processed entirely in your browser and never uploaded.
- Is there a file size limit?
- No fixed limit; it depends on your device's memory.
- Does it add a watermark?
- No, the output is clean.