Password-protect a PDF
Add a password to a PDF with strong AES-256 encryption, free and right in your browser. Your file is never uploaded. No watermark, no sign-up.
- Runs in your browser — files are never uploaded
- No watermark, no sign-up
- Free to use
How it works
- 1
Add your file
Drop your file into the tool. It stays in your browser, never uploaded.
- 2
Run Protect PDF
Click the button and it processes instantly on your device.
- 3
Download or share
Download the result, or turn it into a shareable link and QR code.
Strong AES-256 encryption, applied in your browser. Keep your password safe — we cannot recover it.