Open Refine is a powerful web application designed for cleaning, transforming, and enriching datasets. It is particularly useful for handling messy data, which is often encountered in real-world scenarios. Open Refine allows users to perform various operations such as uploading datasets in formats like CSV, JSON, and Excel, and manipulating columns to improve data quality. It can be downloaded for free and is compatible with Windows, Linux, and Mac OS ².

One of the key features of Open Refine is its use of General Refine Expression Language (GREL), which enables users to write expressions for data manipulation tasks. This includes adding new columns based on existing ones, extracting elements from columns, and enriching datasets with external data. The application runs locally in a web browser, ensuring that users maintain control over their data ¹².

Overall, Open Refine is an excellent tool for those who may not be proficient in programming but need to clean and organize large datasets efficiently.