PDF Encryptor

Encrypt a PDF in your browser with AES-256 password protection. One readable PDF and a non-empty password. A PDF protected with the entered password as both the user and owner password. The same entered password is used for user and owner access; separate owner-password and granular permission controls are not exposed.

Processed locally in your browser — files are never uploaded

Why use this converter?

Key details about this conversion path.

A defined operational boundary

The same entered password is used for user and owner access; separate owner-password and granular permission controls are not exposed.

Controls for this operation

This tool exposes Password settings before processing.

PDF Encryptor

Uses the maintained @cantoo/pdf-lib security implementation with AES-256 (PDF 2.0 revision 6).

Input expectations are explicit

One readable PDF and a non-empty password.

How to use this converter

Follow these three steps.

  1. 1

    Add your input

    Select or drop One readable PDF and a non-empty password.

  2. 2

    Choose settings

    Review Password before processing.

  3. 3

    Process and download

    A PDF protected with the entered password as both the user and owner password.

Frequently asked questions

Details about this conversion and its output.

Common use cases

Practical ways to use this tool.

  • Protect a PDF before sharing it privately.
  • Add AES-256 password protection without uploading the document.
  • Assembling, reviewing, or extracting document pages

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