Multi-language cleanup for reviews and gists
Support tickets attach minified one-liners from production errors. Beautifying before analysis helps you spot the offending function without enabling word wrap in a terminal.
JSON and SQL modes
Switch mental context between languages in one session when documenting an API: format the JSON example, then the SQL migration snippet, without opening three IDE windows.
Not a substitute for Prettier
Teams with Prettier or Black in CI should still commit formatted sources. This page is for ad-hoc cleanup when you do not have the repo cloned.