Bảo vệ PDF bằng mật khẩu
Encrypt your PDF with strong AES-256 protection. Choose whether printing and copying are allowed. The file is protected on your device and never uploaded.
Chạy trong trình duyệt. Tệp của bạn không bao giờ rời khỏi thiết bị.
- 1Thêm tệp
- 2Điều chỉnh
- 3Tải về
Cách hoạt động
- 01Add your PDF.
- 02Choose a password.
- 03Press Protect and download.
Câu hỏi thường gặp
Can you recover a lost password?
No. Nobody can, not even us. Keep the password somewhere safe.
Is my file uploaded to a server?
No. Everything happens inside your browser on your own device. Your files are never sent to us or anyone else.
Is it free?
Yes. It is free to use, with no signup, no watermark and no daily limit.