Protect PDF
Add bank-grade password encryption to your PDF documents.
How it works
Upload PDF
Select the document you want to protect.
Set Password
Choose a strong password for encryption.
Download
Download your password-protected PDF.
About This Tool
Password-protecting a PDF with AES-256 encryption ensures that only people who know the password can open, read, or print it. Lawyers, accountants, HR professionals, and government agencies routinely protect sensitive PDFs before distributing them, whether that is a salary slip, a contract, a legal notice, or personal identification documents.
JustConvert applies 256-bit AES encryption — the same standard used by banks and the Indian banking regulators — directly to your PDF. The protected file works in Adobe Acrobat, built-in PDF viewers on Windows and macOS, and PDF apps on Android and iOS. Your original file is never retained on our servers beyond your session.
- check_circleAES-256 bank-grade encryption
- check_circlePassword required to open the document
- check_circlePrevents unauthorized printing and copying
- check_circleInstant encryption with no software needed
- check_circleCompatible with all major PDF viewers
- check_circleFiles permanently deleted after download
Frequently Asked Questions
What encryption method does the PDF protection use? expand_more
JustConvert uses AES-256 (Advanced Encryption Standard with a 256-bit key), the same standard used by financial institutions and government agencies worldwide. It is computationally impossible to brute-force with current technology.
What if I forget the password I set? expand_more
There is no back door. If you forget the password, the PDF cannot be recovered. Write down your password and store it in a safe place, or use a password manager before encrypting the file.
Can the recipient open the protected PDF on any device? expand_more
Yes. The AES-256 encrypted PDF is compatible with Adobe Acrobat Reader, the built-in PDF viewer on Windows and macOS, and all standard Android and iOS PDF apps. The recipient simply needs to know the password.
Does the tool also prevent printing and copying? expand_more
Yes. The encryption also sets permission restrictions that prevent the content from being printed, copied, or edited without the password. Only authorised users with the correct password can perform those actions.
Is protecting a PDF the same as adding a digital signature? expand_more
No. Password protection restricts who can open the document. A digital signature certifies who created or approved it and detects any subsequent changes. Both serve different purposes and can be used together.