Systems, methods, and software for sensitive data handling frameworks for user applications are provided herein. An exemplary method includes receiving subsets of structured user content consolidated into associated flattened representations, the associated flattened representations having a mapping to the structured user content and accompanied by at least lengths and offset information relating to the mapping. The method includes individually parsing the subsets of structured user content to classify portions as comprising sensitive content corresponding to one or more predetermined data schemes and, for each of the portions, identifying an associated offset and length for the portion relating to the subsets of structured user content, and indicating at least the associated offset and length to the user application for marking of the sensitive content in a user interface to the user application.