Protect PDF - Add Password to PDF Free Online

Password Protect PDF Online Free

Add strong 256-bit AES password protection to any PDF document instantly with no signup required. Whether you need to protect a PDF for sharing sensitive information secure a contract or restrict access to a document HollaPDF encrypts your PDF with industry standard security.

PDF password protection adds encryption to your document so only people who know the password can open and view it.

How to Password Protect a PDF

Upload your PDF file by clicking the upload box
Enter a strong password in the password field
Confirm your password in the second field
Click Protect PDF and download your encrypted document

Tips for a Strong Password

Use a combination of uppercase and lowercase letters numbers and symbols. Avoid using easily guessable information like your name or date of birth. The longer your password the more secure your PDF will be.

Your PDF is processed securely and deleted from our servers immediately after protection is applied. We never store view or share your files or your password.

Frequently Asked Questions

What type of encryption does HollaPDF use?

HollaPDF uses 256-bit AES encryption which is the strongest available PDF security standard and is compatible with all major PDF viewers including Adobe Acrobat.

What happens if I forget my password?

Unfortunately if you forget your password there is no way to recover it. HollaPDF does not store your password anywhere. Please make sure to save your password in a secure location.

Can I remove the password later?

Yes. Use our Unlock PDF tool to remove the password from your protected PDF. You will need to know the current password to unlock it.

Will the protected PDF work on all devices?

Yes. Password protected PDFs created by HollaPDF are compatible with Adobe Acrobat Preview on Mac and all major PDF readers on Windows iOS and Android.