Protect PDF
Protect PDF files with a password. Add encryption so only people with the password can open your PDF. Free, fast, secure, and no sign-up needed.
🔒 This tool processes your file on our secure server. Files are sent over an encrypted connection.
Encrypt a PDF with a password.
or click to choose
Protect PDF files with a password so only people you trust can open them. This online tool encrypts your document and locks it behind a password you choose, making it the easy way to secure a contract, bank statement, or confidential report before you email or share it. Your file is processed on a secure server over an encrypted connection. It is free, fast, requires no sign-up, and adds no watermark.
How to Protect PDF
- Upload the PDF you want to protect.
- Choose a password and encryption strength.
- Download your password-protected PDF.
Frequently asked questions
Is this PDF protection tool free?
Yes. You can password-protect as many PDFs as you like online for free, with no account, no sign-up, and no watermark added to your document.
Are my files kept private and safe for confidential documents?
Your file is uploaded over an encrypted connection, processed on a secure server, and not shared with anyone. For highly sensitive files, use a strong, unique password that you share separately.
What encryption does it use to lock the PDF?
The tool applies standard AES encryption tied to your password, so the PDF cannot be opened or read without it. Without the correct password the contents stay fully scrambled.
Can I open the protected PDF on a phone or any reader?
Yes. The result is a standard encrypted PDF that opens in any modern reader on Windows, Mac, iPhone, or Android. Each viewer simply prompts for the password before showing the pages.
What if I forget the password I set?
There is no way to recover a forgotten password, since that is what keeps the file secure. Store your password safely, and keep an unprotected master copy of the original PDF as backup.
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