PDF Password Protector
Add a password to your PDF and protect your private documents.
Protect PDF Files with a Password Online
Need to keep a PDF document private? Our free PDF Password Protector helps you add password-based encryption to PDF documents directly in your browser. Protect personal records, business documents, reports and other important files.
How to Password Protect a PDF
- Select the PDF file from your device.
- Enter a strong password.
- Enter the same password in the confirmation field.
- Click Protect PDF and wait for encryption to finish.
- Download your password-protected PDF.
Why Add a Password to a PDF?
Password protection can help restrict access to private documents when you share them. A PDF encrypted with a user password requires that password to open in compatible PDF readers. Always use a strong, unique password.
Frequently Asked Questions
Is this PDF Password Protector free?
Yes. You can use this tool without paying a fee.
Does it really encrypt the PDF?
The tool uses a PDF encryption library to apply AES-256 encryption. Verify the downloaded file by opening it in a separate PDF reader and confirming that it asks for your password.
Will the PDF open without a password?
A correctly encrypted PDF using a user password should ask for that password when opened in a compatible PDF reader.
What if I forget the password?
You may not be able to open the document. Store your password somewhere secure before protecting the PDF.
Are my files uploaded?
This implementation reads and encrypts the PDF in the browser. The encryption library itself is loaded from a CDN. Avoid using the tool for highly confidential documents until you have tested its behavior and verified your privacy requirements.
