Check if a file is encrypted Leave feedback

The encryption protects data and allows only authorized people to open the file. So, only those who have an encryption key (such as a password) can open and view a file.

1. Navigate to the GroupDocs.Viewer App.

2. Upload your file. If you are prompted to enter a password to open the file, it is encrypted.

Warning

It’s important to be cautious about uploading sensitive files to online services. For critical files, we recommend using a programmatic method.

Use the getFileInfo() method that returns the file type and flag that indicates if the file is encrypted. The following code snippet shows how to check if a file is encrypted.

import com.groupdocs.viewer.Viewer;
import com.groupdocs.viewer.results.FileInfo;
// ...

try (Viewer viewer = new Viewer("protected.pdf")) {
    FileInfo fileInfo = viewer.getFileInfo();

    System.out.println("File type is: " + fileInfo.getFileType());
    System.out.println("File encrypted: " + fileInfo.isEncrypted());
}

Tip

Download a sample application written in Java that uses this code snippet. You can run the application locally using the mvn exec:java command. Ensure you have the Java and Maven installed beforehand.

The following shows a sample console output:

$ mvn exec:java -q
File type is: Portable Document Format File (.pdf)
File encrypted: true

To learn how to open an encrypted file, please refer to Load password-protected document documentation topic.