PDF tools / Security & privacy
Encrypt PDF
Protect a PDF with an AES-256 opening password. Your files stay on your device.
Encrypt PDF
Protect a PDF with an AES-256 opening password.
Your documents are processed on this device. Files are not uploaded. Maximum 100 MB per file.
Drop files or a folder here
Choose a PDF document.
- Keep the password securely. Password loss cannot be recovered by this tool.
How to use Encrypt PDF
- Choose your files or drop them into the upload area.
- Adjust the settings and review the processing notes.
- Run the tool and check the downloaded result before sharing.
Files are processed in your browser. Engines, fonts and OCR or speech models may need to download first. Processing speed and file limits depend on your device.