PDF 加密保護

為 PDF 文件新增密碼保護

所有處理皆在瀏覽器中完成，不會上傳任何資料。

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.

🔒所有處理皆在瀏覽器中完成，不會上傳任何資料。

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.