Protect PDF
Add password protection to your PDF with 128-bit AES encryption
Password-protect a PDF
Some documents are not meant for everyone — bank statements, contracts, payslips, medical letters and confidential reports all benefit from an extra lock. Protect PDF adds a password to your document so that only people who know it can open and read the contents, giving you a simple layer of security before you email or upload a sensitive file.
Encrypting a PDF is especially worthwhile when you are sending it over email or sharing it through a service you do not fully control, where the file could be forwarded or intercepted.
How to protect a PDF
Upload your PDF, choose a strong password, and download the encrypted version. Anyone who opens the protected file afterwards will be prompted for that password. Keep a note of it somewhere safe, because the document cannot be opened without it.
Your file and password stay with you
Encryption is performed entirely in your browser. Neither your document nor your password is ever sent to a server, so the security never depends on trusting a third party with your data.
Frequently Asked Questions
Is it free to password-protect a PDF?▾
Yes. Adding a password to your PDF is completely free with no account needed.
Is my PDF processed securely?▾
Yes. The password is applied in your browser — your file and password are never sent to our servers.
Is my password stored anywhere?▾
No. Your chosen password is used locally during encryption and is never stored or logged by us.
Can I open the protected PDF on any device?▾
Yes. The resulting encrypted PDF can be opened with any standard PDF viewer that supports password-protected files.