Detect File Format of Encrypted Office Open XML - OOXML Files

Office Open XML (also known as OOXML or Microsoft Open XML (MOX)) is an XML-based file format developed by Microsoft for representing office documents like spreadsheets, charts, presentations, and word processing documents.

Aspose.Cells provides a way to detect the file format of encrypted Microsoft Open XML files. To identify the file type, use the FileFormatUtil.detectFileFormat method as shown below in the code example.

Assign and Validate Digital Signatures How to Detect a File Format and Check if the File is Encrypted