PDF 加密保护

为 PDF 文档添加密码保护

所有处理均在浏览器中完成，不会上传任何数据。

Offline Ready

File Input

File Output

Protect PDF with Password

Encrypt a PDF with a password (AES-256) so it can't be opened without it. Encryption runs entirely in your browser via MuPDF; nothing is uploaded.

🔒所有处理均在浏览器中完成，不会上传任何数据。

How to Use

Upload a PDF, enter a password, and click "Protect PDF" to add password protection. All processing happens locally in your browser. Your password is never sent to any server.