MDF4 Validator is a freeware tool to validate and analyze the block structure of MDF files (3.x/4.x). It will check the loaded MDF file and display format errors and violations to the specification that disallow loading the file in Vector tools. Unusual or unsupported features are indicated as warnings. MDF Validator also shows the structure of the MDF blocks that contain the (meta) information about the measurement data, which helps exploring the file content and understanding the MDF format. Please note: MDF Validator is NOT able to display the measurement data itself, e.g. as a graphic curve representation. Use Vector vSignalyzer instead.