Protect PDF with Password

Frequently Asked Questions

What encryption standard is used?

AES-256 encryption — the same standard used by banks and governments. Your PDF will require the password to open.

Can I encrypt a PDF that already has a password?

Yes, upload the decrypted version (or decrypt it first) and then apply a new password.

Is this tool free to use?

Yes, completely free. No account, no subscription, no hidden limits.

Are my files safe? Do you upload them?

Your files never leave your device. All processing runs locally in your browser using JavaScript — nothing is sent to any server.

Does it work on mobile?

Yes, it works on all modern browsers including mobile Safari and Chrome on iOS and Android.