A data profiling server extracts data from multiple data sources and stores the extracted data in a target data store. Validation functions are performed on the extracted to determine whether the data conforms to validation rules associated with the target data store and/or business logic definitions. For data that does not conform to the validation rules, the data profiling server identifies recommended transformations to be applied to the data to correct any errors that cause the data to not conform with the validation rules. A data profiling application presents to a user the data extracted from the multiple data sources in a grid structure. The grid structure also includes error indicators identifying the data that does not conform to the validation rules and specifies the recommended transformations identified by the data profiling server.