What are your favorite tiny tools when working with data?
Here are three examples:
→ http://ucbvislab.github.io/d3-deconstructor/ to get the data out of d3 visualizations
→ https://shancarter.github.io/mr-data-converter/ convert CSV to JSON
→ https://countries.zeto.io input country name, output country codes (by @zeto@twitter.com)