Password Protect PDF
Password protect a PDF
Encrypt the document with AES-256 and an opening password.
Privacy
Processing takes place in your browser. PDFs, certificates and passwords are not uploaded to the BAOI server. Required libraries, the OCR engine and language models are served by BAOI without an external 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.