用密码保护 PDF
添加打开密码并限制权限。在浏览器中运行 — 不上传。
在此处拖放 PDF
或点击浏览
仅支持 PDF 文件
添加打开密码并限制权限。在浏览器中运行 — 不上传。
在此处拖放 PDF
或点击浏览
使用方法
Upload your PDF
Drop the PDF you want to protect onto the upload zone.
Set a strong password
Enter the password you want to use. The tool applies AES-256 encryption — the same standard used by banks and governments.
Download the protected PDF
Click Protect. Download the encrypted file and test it immediately by opening it in a new tab to confirm the password prompt appears.
常见问题