¿Qué es Proteger PDF con contraseña?

Herramienta gratuita de cifrado PDF en línea. Añade protección con contraseña a archivos PDF para evitar el acceso no autorizado.

¿Por qué usar Proteger PDF con contraseña?

  • Set user password for opening the document
  • Optional owner password for editing permissions
  • Toggle print and copy permissions
  • All encryption is local — files never leave your device

Cómo usar Proteger PDF con contraseña — Paso a paso

1

Upload a PDF file by clicking or drag-and-drop.

2

Enter a user password (required to open the PDF).

3

Optionally set an owner password and toggle permissions.

4

Click Protect and download your password-protected PDF.

¿Para quién es Proteger PDF con contraseña?

  • securing confidential documents
  • sharing sensitive files
  • protecting contracts
  • document security

Proteger PDF con contraseña — Preguntas frecuentes

What is the difference between user and owner password?

The user password is required to open and view the PDF. The owner password controls permissions (printing, copying) and can be used to remove protections. If only the user password is set, the document can still be opened without restriction in some viewers.

Is the encryption secure?

PDF-Lib uses standard PDF encryption (AES-128 or RC4-128). While not military-grade, it provides sufficient protection for everyday document sharing.

¿Listo para usar Proteger PDF con contraseña?

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