Protect PDF
Lock a PDF with a password using AES-256.
Free, no sign-up. It runs inside your browser: your files never leave your device.
Protect a PDF with a password using AES-256 encryption. Nobody can open the file without the password, and you can also limit printing, copying and editing.
How to use Protect PDF
- Drop one or more PDF files.
- Type a password to open the file, then type it again.
- Open "What others can do" to limit printing, copying, editing, comments, forms or page changes. You can also set an owner password.
- Click "Protect PDF".
Questions
How strong is the protection?
Files are encrypted with AES-256, the strongest PDF standard.
Do the limits on printing and copying work everywhere?
Readers like Acrobat, Chrome and Preview honour the limits.
What if I forget the password?
Keep it safe. Remove password needs the password to open the file, so it cannot get a forgotten password back.
Is my password sent anywhere?
No. The file is locked in your browser, and the password never leaves your device.
More Security & privacy tools
- Remove password: Open a protected PDF and save it without the password.
- Remove restrictions: Remove print, copy and edit limits from a PDF you own.
- Auto-redact personal data: Find and remove Aadhaar, PAN, card numbers, emails, phones.
- Privacy risk scanner: Find personal data and hidden metadata before you share.
- File fingerprint: Hashes to verify a file, compare files and check a hash.