Protect PDF online free
Add a password so others need it to open the PDF.
Quick Guide
How to Use: Protect PDF online free
1. Upload Document
Select files from your device or drag and drop your document into the upload area above.
2. Process & Customize
Adjust options to your preference. The system processes and optimizes your document instantly.
3. Instant Download
Save your clean output file with zero watermarks, ready for any personal or official use.
256-bit SSL Security
End-to-end SSL/HTTPS encrypted processing. Your files are automatically deleted within 1 hour.
Zero Watermarks
Clean documents with no added watermarks. Preserves sharp typography and original layout.
Cross-Platform Access
Works smoothly on macOS, Windows, iOS, and Android without downloading any third-party app.
Protect FAQ
- Is the PDF encrypted?
- Yes — AES-style password protection via PDFBox.