Occasionally, you may need to protect PowerPoint documents. For instance, when you want to prevent unauthorized users from viewing and editing a PowerPoint document. Conversely, sometimes you may also need to unprotect PowerPoint documents. For example, when you wish to make a password-protected PowerPoint document accessible to everyone. In this article, we will introduce how to protect or unprotect PowerPoint documents in Java using Spire.Presentation for Java.

• Protect a PowerPoint Document with a Password
• Mark a PowerPoint Document as Final
• Remove Password Protection from a PowerPoint Document
• Remove Mark as Final Option from a PowerPoint Document

Install Spire.Presentation for Java

First of all, you're required to add the Spire.Presentation.jar file as a dependency in your Java program. The JAR file can be downloaded from this link. If you use Maven, you can easily import the JAR file in your application by adding the following code to your project's pom.xml file.

<repositories>
    <repository>
        <id>com.e-iceblue</id>
        <name>e-iceblue</name>
        <url>https://repo.e-iceblue.com/nexus/content/groups/public/</url>
    </repository>
</repositories>
<dependencies>
    <dependency>
        <groupId>e-iceblue</groupId>
        <artifactId>spire.presentation</artifactId>
        <version>9.3.1</version>
    </dependency>
</dependencies>
    

Protect a PowerPoint Document with a Password in Java

You can protect a PowerPoint document with a password to ensure that only the people who have the right password can view it.

The following steps demonstrate how to protect a PowerPoint document with a password:

• Initialize an instance of Presentation class.
• Load a PowerPoint document using Presentation.loadFromFile() method.
• Encrypt the document with a password using Presentation.encrypt() method.
• Save the result document using Presentation.saveToFile() method.

import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;

public class ProtectPPTWithPassword {
    public static void main(String []args) throws Exception {
        //Create a Presentation instance
        Presentation presentation = new Presentation();

        //Load a PowerPoint document
        presentation.loadFromFile("Sample.pptx");

        //Encrypt the document with a password
        presentation.encrypt("your password");

        //Save the result document
        presentation.saveToFile("Encrypted.pptx", FileFormat.PPTX_2013);

    }
}

Mark a PowerPoint Document as Final in Java

You can mark a PowerPoint document as final to inform readers that the document is final and no further editing is expected.

The following steps demonstrate how to mark a PowerPoint document as final:

• Initialize an instance of Presentation class.
• Load a PowerPoint document using Presentation.LoadFromFile() method.
• Mark the document as final using Presentation.getDocumentProperty().set() method.
• Save the result document using Presentation.SaveToFile() method.

import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;

public class MarkPPTAsFinal {
    public static void main(String []args) throws Exception {
        //Create a Presentation instance
        Presentation ppt = new Presentation();
        //Load a PowerPoint document
        ppt.loadFromFile("Sample.pptx");

        //Mark the document as final
        ppt.getDocumentProperty().set("_MarkAsFinal", true);

        //Save the result document
        ppt.saveToFile("MarkAsFinal.pptx", FileFormat.PPTX_2013);
    }
}

Remove Password Protection from a PowerPoint Document in Java

You can remove password protection from a PowerPoint document by loading the document with the correct password, then removing the password protection from it.

The following steps demonstrate how to remove password protection from a PowerPoint document:

• Initialize an instance of Presentation class.
• Load a PowerPoint document using Presentation.loadFromFile() method.
• Mark the document as final through Presentation.removeEncryption() method.
• Save the result document using Presentation.saveToFile() method.

import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;

public class RemovePasswordProtectionFromPPT {
    public static void main(String []args) throws Exception {
        //Create a Presentation instance
        Presentation presentation = new Presentation();

        //Load a password-protected PowerPoint document with the right password
        presentation.loadFromFile("Encrypted.pptx", "your password");

        //Remove password protection from the document
        presentation.removeEncryption();

        //Save the result document
        presentation.saveToFile("RemoveProtection.pptx", FileFormat.PPTX_2013);

    }
}

Remove Mark as Final Option from a PowerPoint Document in Java

The mark as final feature makes a PowerPoint document read-only to prevent further changes, if you decide to make changes to the document later, you can remove the mark as final option from it.

The following steps demonstrate how to remove mark as final option from a PowerPoint document:

• Initialize an instance of Presentation class.
• Load a PowerPoint document using Presentation.loadFromFile() method.
• Remove the mark as final option from the document using Presentation.getDocumentProperty().set() method.
• Save the result document using Presentation.saveToFile() method.

import com.spire.presentation.FileFormat;
import com.spire.presentation.Presentation;

public class RemoveMarkAsFinalFromPPT {
    public static void main(String []args) throws Exception {
        //Create a Presentation instance
        Presentation ppt = new Presentation();
        //Load a PowerPoint document
        ppt.loadFromFile( "MarkAsFinal.pptx");

        //Remove mark as final option from the document
        ppt.getDocumentProperty().set("_MarkAsFinal", false);

        //Save the result document
        ppt.saveToFile("RemoveMarkAsFinal.pptx", FileFormat.PPTX_2013);
    }
}

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