csvkit. “A suite of command-line tools for converting to and working with CSV”—includes a huge range of utilities for things like converting Excel and JSON to CSV, grepping, sorting and extracting a subset of columns, combining multiple CSV files together and exporting CSV to a relational database. Worth reading through the tutorial which shows how the different commands can be piped together.
Recent articles
- First impressions of Claude Cowork, Anthropic's general agent - 12th January 2026
- My answers to the questions I posed about porting open source code with LLMs - 11th January 2026
- Fly's new Sprites.dev addresses both developer sandboxes and API sandboxes at the same time - 9th January 2026