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Protect PDF

Add a password and AES-256 encryption to a PDF.

Protect PDF adds a password to a PDF using AES-256 encryption, so it cannot be opened without the password. You can also block printing, copying, or editing. Encryption runs in your browser, so neither the file nor the password is sent anywhere.

Drop PDF file here

Add a password and AES-256 encryption to a PDF.

Set a password

After opening, allow people to:

Uses AES-256 encryption. Permission limits are honored by standard PDF viewers but are not a strong protection on their own; the password is what keeps the content private.

Your files never leave your browser.

How to protect PDF

How to protect PDF

Add a password and AES-256 encryption to a PDF. To use this tool, select your file, follow the page-specific options, review the result, and download the new document. Processing happens in your browser.

How to protect PDF

  1. Select or drop the file you want to process.
  2. Choose the pages and options that fit your task.
  3. Run the operation and wait for the browser to finish.
  4. Review the result before saving or sharing it.
  5. Download the processed file to your device.

Why use this tool?

This browser-based workflow is useful for preparing PDF documents while keeping the source file on your device.