nail

Fast command-line tool for analyzing and transforming Parquet, CSV, JSON, and Excel files.

Desktopfree

nail is a fast, open source command-line tool for analyzing, transforming, and exploring Parquet, CSV, JSON, and Excel files, built with Rust, Apache Arrow, and DataFusion. It processes gigabyte-scale datasets quickly using SQL-powered operations, works entirely offline as a single binary, and supports piping data between commands and other tools. It's aimed at data analysts and engineers who want a zero-configuration way to work with large tabular files.

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Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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