Password-protect your PDF
Lock a PDF with a password before emailing contracts, invoices or personal documents. BunnyConvert applies AES encryption directly in your browser, so the file — and the password — never leave your device.
▶ Open the tool✓ Processed on your device✓ No sign-up to start✓ Free & unlimited on the web
How it works
- Open the Protect PDF tool and select your file.
- Choose a strong password.
- Convert and download the encrypted PDF.
Frequently asked questions
- What kind of encryption is used?
- The PDF is protected with AES encryption, the standard supported by all major PDF readers.
- What if I forget the password?
- There is no backdoor — an encrypted PDF cannot be opened without its password, so store it somewhere safe.
- Is my file or password sent anywhere?
- No. Encryption happens entirely in your browser; neither the document nor the password leaves your device.