The Marriott Reparative Metadata Assessment Tool (MaRMAT) is an open-source application created by librarians at the University of Utah’s J. Willard Marriott Library to help metadata practitioners flag various terms and phrases within metadata records using pre-curated and custom lexicons. MaRMAT is schema agnostic and supports library and museum professionals in assessing metadata for harmful, outdated, and otherwise problematic language as well as in performing text-based analyses of tabular metadata.