This technical tip shows how developers can protect MS Excel workbooks using Aspose.Cells for Cloud API inside their own cloud applications. When a worksheet is protected, user's actions are restricted. For example, you cannot input data. Moreover, you can't insert or delete rows or columns etc. There are mostly 3 protection options in MS Excel, such as protecting Contents, Objects or Scenarios. Protected worksheet doesn't hide or protect sensitive data, so it's different from file encryption. Generally, worksheet protection is suitable for presentation purposes. It prevents the end users from modifying the data, content and formatting in the worksheet. Developers can use Aspose REST API with any language for their choice such as .NET, Java, PHP, Ruby, Rails, Python, jQuery and many more. For code samples and other details please visit the main page.