Password protect a PDF
Encrypt the document with AES-256 and an opening password.
Privacy
The PDF, certificate and passwords stay in your browser. BAOI does not upload them to its server. OCR only loads the engine and language data from a CDN.
Questions about this tool
What should I verify before password-protecting a PDF?
Keep an untouched original and confirm the intended security or identity parameters before producing the final file.
Will every PDF viewer enforce or display the result the same way?
No. Viewer support varies, especially for signatures, permissions and encryption features. Test with the viewers used by recipients.
What should I check afterwards?
Reopen the generated PDF, verify pages and content, then confirm the protection or signature state in an independent viewer.