Password Protect PDF

Why use Password Protect PDF?

Password Protect PDF works on your documents locally, so you get the result in seconds with no watermarks, no sign-up and no files leaving your device.

• 100% private: files are processed in your browser and never uploaded.
• Completely free, with no account, no watermarks and no usage limits.
• Handles Input/Output: PDF (.pdf); Encryption: standard PDF password encryption (AES).
• Add the PDF you want to protect (it must open without a password already).
• Works on any device — desktop, tablet and phone — and is fully keyboard accessible.

How to use Password Protect PDF

1. Add the PDF you want to protect (it must open without a password already).
2. Enter a password and confirm it — this is what people will need to open the file.
3. Optionally choose whether readers may print, copy text, or edit the document.
4. Click Protect & download to get the encrypted PDF.

Examples

• Adding a password to a contract before emailing it.
• Locking a financial statement so only the recipient can open it.

Supported formats

• Input/Output: PDF (.pdf)
• Encryption: standard PDF password encryption (AES)

Limitations

• The source PDF must already open without a password.
• There is no way to recover the file if you forget the password — store it safely.
• Permission settings (print/copy/edit) are honoured by most, but not all, PDF readers.