Psychology research often necessitates the comparison of varying questionnaires, a task that can be time-consuming and immensely subjective. Tools like Harmony streamline this process for researchers, enabling efficient and precise comparisons. For instance, psychologists who need to compare the Center for Epidemiological Studies-Depression (CES-D) and the Preschool Behaviour Questionnaire (PBQ) can employ Harmony’s capabilities, thereby reducing effort and increasing objectivity in the CES-D vs PBQ comparison process. Harmony utilizes largely based language models to generate percentage matches between each item in CES-D and PBQ, making the CES-D vs PBQ harmonisation process more efficient and accurate. Researchers can select instruments from Harmony’s database or drag and drop their own instruments in PDF form into Harmony’s web interface. This flexibility accommodates a broad range of use-cases and gives researchers greater agency in their CES-D vs PBQ comparisons. Harmony’s multilingual capabilities offer even greater versatility for CES-D vs PBQ evaluations, allowing for potential cross-cultural studies. By navigating to https://harmonydata.ac.uk/app, users can access the platform’s functionalities and make their CES-D vs PBQ comparison process a more convenient and effective journey. Utilizing Harmony ensures more time can be allocated to insightful analysis rather than the tedious task of manual questionnaire item matching.