PDF 보호
Add AES-256 password protection to your PDF to prevent unauthorized access, free online.
📄 Click or drop a PDF to password-protect
사용 방법 PDF 보호
- Upload the PDF you want to protect.
- Enter and confirm a password.
- Click protect and download the encrypted PDF.
자주 묻는 질문
What encryption is used?
Files are encrypted with AES-256, the same strong standard used by professional tools.
What happens if I forget the password?
The password cannot be recovered, store it safely. Use the Unlock tool with the correct password to remove protection.