Free browser-local JSON formatter, validator & converter.
JFmt is a free online JSON formatter, validator and viewer that runs entirely in your browser (Web Worker) — no upload, no sign-up, no stored history. Format, validate, repair, sort keys, JSONPath, diff, tree/mind-map views, convert JSON ↔ CSV/Excel, XML, YAML, TOML, query strings, Postman. UI in 10 languages.
