With MobiPDF you can password-protect your documents, encrypt them, and restrict user access partially or fully. To perform any of these actions:
1. Open MobiPDF and tap Tools > Protect.
2. Choose a file from your internal storage or preferred cloud service.
3. Tap Protect again.
4. Select one or both of the below options:
- Require a password to open the document
- Restrict editing, printing, and extracting
Type your password for the file and choose if you want to restrict certain options to users and if you want to encrypt your PDF entirely or just the metadata.
5. Tap Save to confirm your changes.
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