Power Query Editor

The Power Query Editor provides a browser-based environment to author and test Power Query M scripts. It offers immediate feedback on syntax, semantics, and results against sample datasets, enabling data professionals to prototype transformations without desktop software. Conceptually, it parses M code into an internal representation, evaluates transformations against mocked data sources, and exposes the resulting schema and sample outputs for verification. This facilitates rapid iteration, comparison of approaches, and early error detection. The tool benefits data analysts, BI developers, data engineers, and students working with M language, providing a lightweight, safe sandbox for experimentation and planning, before integrating logic into production pipelines. Core value lies in browser-based iteration, reproducible results, and a focused environment that accelerates data shaping and ETL planning. Core features include code input, syntax validation, sample datasets, result previews, and error localization. Use cases span validating a query against a sample dataset, debugging a transformation sequence, and preparing M logic for deployment in desktop or cloud BI workflows.