The article on RecoveryTools provides a detailed guide on how to open MDF files, which are SQL Server database files. It outlines multiple methods, starting with the manual approach using SQL Server Management Studio (SSMS), where users can attach the MDF file to a server instance to view its contents. However, this method has limitations, such as the need for an active SQL Server environment and difficulties with corrupted files. The article also introduces an automated solution with the RecoveryTools SQL MDF Viewer, which simplifies the process by allowing users to view MDF files without SQL Server. The tool can also repair corrupted files, and the Pro version offers additional features like exporting data. The article highlights alternative methods such as opening MDF files in Notepad or Excel by converting them to SQL or CSV formats.