PDF Password Protect
Wrap a PDF in an AES-256 encrypted lock file with a password.
PDF tool
Drop a PDF to protect
or click to browse
application/pdf · up to 100MB
Uses AES-256-GCM with PBKDF2 (200k iterations). Anyone with the password and this tool can decrypt.
How it works
- Open the tool — no signup required.
- Enter or paste your input.
- Adjust the options to your needs.
- Copy or download the result instantly.
Frequently asked questions
Is PDF Password Protect really free?+
Yes, entirely free with no limits or signup.
Is my data safe?+
Processing happens in your browser — your input never leaves your device.
Can I use it commercially?+
Yes, you own your output.
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