Cisdem PDF Password Remover helps you remove passwords and restrictions from protected PDF files. It supports removing permission passwords and open passwords, whether you know the open password or need to recover it.

This guide explains how to use Cisdem PDF Password Remover to unlock and remove protection from your PDF files.

Getting Started

Download & Install

1. Download Cisdem PDF Password Remover from the official website.

Free Download

2. Open the downloaded .dmg file.

3. Drag Cisdem PDF Password Remover to the Applications folder.

4. Launch the app from Applications or Launchpad.

Activate the Full Version

You can use the trial version to test the app. To access the full version, activate it with your license code.

1. Launch Cisdem PDF Password Remover.
2. Click the Key icon in the upper-right corner.
3. Enter or paste your license code.
4. Click Activate.

 

Understand PDF Password Types

PDF files can be protected with two common types of passwords.

Open Password

An open password, also called a user password, prevents a PDF from being opened without the correct password.

If a PDF has an open password, it will be marked with a lock icon after you add it to Cisdem PDF Password Remover.

Permission Password

A permission password, also called an owner password, controls whether a PDF can be printed, copied, edited, or otherwise modified.

A PDF protected only by a permission password can usually be opened normally, but certain actions may be restricted.

How Cisdem Identifies Password Protection

Cisdem PDF Password Remover automatically detects the type of protection:

• Unprotected PDF: Cannot be added to the app.
• Open-password-protected PDF: Displayed with a lock icon.
• Permission-password-protected PDF: Can be added without a lock icon.

Tip: If a PDF has both an open password and a permission password, removing its protection will remove both passwords.

Remove a Permission Password

If your PDF has only a permission password, you don't need to know the password to remove the restrictions.

Step 1 Add PDF files

You can add multiple PDF files at once.

Choose any of the following methods:

• Drag and drop the PDF files into the main interface.
• Click and select the PDF files.
• Choose File > Add Files from the macOS menu bar.

To remove an imported file, select it and click  . You can also clear all imported files at once by clicking .

Step 2 Choose an Output Location

1. Click   at the bottom of the interface.
2. Select a folder where you want to save the unlocked PDF files.
3. Click .

Cisdem PDF Password Remover will create new PDF files without the permission restrictions. Your original file will not be modified.

Remove an Open Password You Know

If your PDF requires an open password and you know the password, you can remove the protection directly.

Step 1 Add PDF files

Add one or more password-protected PDF files by:

1. Dragging and dropping them into the main interface.
2. Clicking .
3. Choosing File > Add Files from the menu bar.

PDF files protected with an open password will display a lock icon.

Step 2 Enter the Open Password

1. Click next to the PDF.
2. Enter the open password.
3. Click OK.

Step 3 Remove the Password

1. Select an output location.
2. Click .

The app will create new PDF files without password protection. 

Note: If the PDF has both an open password and a permission password, both types of protection will be removed.

Remove an Open Password You Forgot

If you don't know the open password, Cisdem PDF Password Remover can try to recover it based on the password information you provide.

Step 1 Add the Protected PDF

Add the password-protected PDF to the app.

The PDF will be marked with a lock icon.

Step 2 Open Password Recovery

• Click .
• In the password window, click
• Enter as much information as you remember about the original password.

Depending on the available options, you can provide password clues such as:

• Password length
• Uppercase letters
• Lowercase letters
• Numbers
• Special characters

Step 3 Start Decryption

Click   to start recovering the password.

Cisdem will try possible password combinations based on the conditions you provided.

The decryption window displays the progress and estimated information while the process is running.

Tip: The recovery time depends on the complexity of the password and the clues you provide. A longer or more complex password may take considerably more time to recover.

You can leave the process running while you work on other tasks.

Step 4 Save the Unlocked PDF

After the password is successfully recovered:

1. Select an output location.
2. Click .

Cisdem PDF Password Remover will create a new PDF without password protection.

Note: If the PDF was protected with both an open password and a permission password, both types of protection will be removed.

 

Update Cisdem PDF Password Remover

We recommend keeping Cisdem PDF Password Remover up to date to get the latest improvements and bug fixes.

The app automatically checks for updates when you launch it.

You can also check for updates manually:

1. Open Cisdem PDF Password Remover.
2. Click Cisdem PDF Password Remover in the macOS menu bar.
3. Select Check for Updates.

If a new version is available, follow the on-screen instructions to install it.