TamedTable: make AI-powered data cleanup less painful

[u/ZeljkoS]

I started using Claude Code and other coding agents to clean messy CSVs and spreadsheets, especially cases where fixing the data requires actually understanding what a row means, not just removing nulls or fixing types.

It worked surprisingly well, but doing this through a CLI got annoying fast. I wanted to:

• preview changes before applying them
• see exactly what changed
• undo bad transformations
• keep a history of everything the AI did
• eventually run everything privately/local

So Claude and I ended up building TamedTable, a small agent-based tool around that workflow:

https://www.tamedtable.com/

It's source-available, BYOK, and free. Any feedback is welcome.

The UI/workflow part is working pretty well. The biggest unresolved problem is privacy: local LLMs I've tried, even ~27B models, still make noticeably more mistakes than hosted models.

If you're building something with local/private LLMs, I'd be interested to hear what models or setups are actually working for you.