NamahaPDF
Password Protect

Lock your PDF withAdobe-style encryption.

Upload your PDF and we'll automatically detect if it's already password protected. Set a new password or change the existing one with AES-256 encryption.

Auto-detect encryption
AES-256 output
Preserves quality

How it works

Upload your PDF and we automatically detect whether it's already password protected. Unlock it if needed, then set a new password with AES encryption.

1

Upload PDF

Choose your file - we automatically detect encryption.

2

Unlock if needed

If encrypted, enter the current password to unlock.

3

Set new password

Choose your new password with AES-256 encryption.

4

Download

Get your protected PDF ready to use.

Result

Processing status

Waiting for action

Complete the steps above to protect your PDF

Frequently asked questions

How do I put a password on a PDF?

Upload your PDF, set an open password, and NamahaPDF encrypts the file with AES-256 so it can only be opened by someone who enters the correct password.

How strong is the encryption?

The PDF is locked with AES-256, the same encryption standard used for sensitive data in banking and government systems.

Is my password or file sent to a server?

No. Encryption happens entirely in your browser, so neither your password nor your document ever leaves your device.