DataFrog Tools is a free, privacy-first suite of 40+ developer utilities. All file conversions, formatting, and rendering happen 100% in your local browser. No data is ever uploaded or stored on a server, featuring secure Excel, CSV, JSON, and QIF tools.
Munquet is a lightweight desktop tool for preparing and transforming tabular datasets quickly and safely. It converts, merges, and validates files into efficient Apache Parquet format — reducing file size, improving performance, and simplifying downstream analytics workflows.
