Protect PDF With Password | Encrypt PDF Online

Encrypt PDF documents with a password before sharing, storing or sending them. Processing happens directly in your browser.

PDF

Upload a PDF

Drag and drop your PDF here or choose a file from your device.

Choose PDF

No file selected

Password to open PDF

Enter a password.

Confirm password

Current PDF password

Output filename

Leave the current PDF password empty when the uploaded PDF is not already encrypted.

Printing permission

No printing Allow low-resolution printing Allow high-resolution printing

Keep your password in a secure place. PDF password protection is designed to prevent unauthorized opening of the protected document. If you lose the password, this tool cannot recover it.

Preparing PDF... 0%

Loading encryption engine...

PDF protected successfully

Pages 0

Original size 0 KB

Protected size 0 KB

The generated PDF uses AES-256 encryption. Enter the password when opening the downloaded document.

Protect PDF Files With a Password

A password-protected PDF requires the correct password before the document can be opened. This tool applies real PDF encryption rather than placing a visual password notice over the document.

The encryption runs in your browser. Your PDF does not need to be uploaded to a document-processing server.

How to Password Protect a PDF

1. Upload your PDF.
2. Enter a strong password.
3. Confirm the password.
4. Choose the printing permission.
5. Click Protect PDF.
6. Download the encrypted PDF.

What This Tool Protects

• PDF opening access with a user password.
• PDF content using AES-256 encryption.
• Printing permissions through the PDF security settings.
• Existing PDF files without sending them to a remote upload service.

Why Use a Strong PDF Password?

A short or predictable password is easier to guess. Use a long password with a mixture of words, numbers and symbols. Avoid names, dates and common phrases.

Important Password Warning

The password is not stored by this page. If you lose the password, the tool has no password-recovery service for the protected PDF.

For sensitive documents, verify the downloaded PDF by opening it in a separate PDF viewer and confirming that the password is required.

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Frequently Asked Questions

Does this tool actually encrypt the PDF?

Yes. The tool uses PDF encryption rather than adding a visual password message to the document.

What encryption does the tool use?

The current browser implementation uses AES-256 PDF encryption.

Is my PDF uploaded to a server?

No. The encryption process runs in your browser and the protected file is generated locally.

Can I protect an already password-protected PDF?

Yes. Enter the existing PDF password in the Current PDF password field before protecting the document again.

Can I prevent printing?

Yes. You can disable printing or allow low-resolution or high-resolution printing through the PDF permission settings.

What happens if I forget the password?

The tool does not store or recover passwords. Keep a secure copy of the password before distributing the protected PDF.