保護
為 PDF 新增密碼
直接在您的瀏覽器中用密碼加密您的文件。
- 檔案在您的裝置上處理
- 無檔案大小限制
- 100% 免費
Restoring your session…
How to password-protect a PDF
- 1Import the PDF you want to protect.
- 2Enter a password and confirm it.
- 3Encrypt the document and download the protected version.
Frequently asked questions
Does the password pass through a server?
Never. Encryption happens in your browser; the password never leaves your device.
What kind of protection is applied?
Standard PDF encryption that requires the password to open the file.
What if I forget the password?
The file can't be opened without it — store it safely, as we never keep it.