Protect PDF
Password protect your PDF
Secure with AES-128 encryption
Drop a PDF here or click to browse
Password Settings
Security: Your PDF will be encrypted with AES-128. Remember your password - it cannot be recovered!
Encrypt your PDF with AES-128 password protection — secure sensitive documents before sharing, without uploading them anywhere.
Frequently asked questions
- What encryption standard does Smash use?
- AES-128, the same standard used by Adobe Acrobat and most professional PDF software.
- Can I also restrict printing and copying?
- Yes. Set an owner password to configure custom permissions — restrict printing, copying text, and editing independently.
- Will all PDF readers accept the password protection?
- Yes — AES-128 is supported by all major PDF viewers including Adobe Acrobat, macOS Preview, and browser-based PDF viewers.
- What if I forget the password?
- There is no recovery option. Choose a password you'll remember or store it in a password manager.
- Is this strong enough for sensitive documents?
- AES-128 is considered secure for typical use cases. For classified or legally sensitive material, consult your organisation's information security policy.