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● Files are never uploaded
Protect PDF (Add Password)
When you share a confidential contract, a payslip or an ID document, you want only people with the password to open it. The Protect PDF tool adds an open password to your document and encrypts it with strong 256-bit AES.
Most importantly, the encryption happens entirely in your browser, on your device. Your PDF and your password are never uploaded to a server. This is the safest way to password-protect sensitive files — unlike most online tools, your file never leaves your device.
No sign-up, no payment, no install. Haven PDF is free and runs in your browser.
How to
- Open your PDF. Drag and drop the PDF you want to protect.
- Set a password. In the Security section of the download menu, enter an open password.
- Download. Save the encrypted PDF to your device with one click.
Frequently asked questions
- Are my file or password sent to a server?
- No. Encryption happens entirely in your browser; neither your PDF nor your password leaves your device.
- What encryption is used?
- Industry-standard 256-bit AES. The PDF cannot be opened without the password.
- What if I forget the password?
- Only you hold the password; there is no recovery. Keep it somewhere safe.
- Is it free?
- Yes, completely free. No sign-up, no payment, no install required.
- How do I password protect a PDF?
- Open your PDF, enter an open password in the Security section of the download menu, and download the PDF encrypted with 256-bit AES — your file and password never leave your device.
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