About This Launch
NextJSON is a free online JSON toolbox that runs entirely in your browser. Decode nested and escaped JSON strings, format and view JSON, compare two JSON files, generate JSON Schema and convert JSON to TOON, with no sign-up needed.
Why I Built This
I kept hitting deeply nested, escaped JSON strings in API logs and could not find a fast, private tool to unpack them, so I built one that works fully in the browser.
Launch Details
CategoryDeveloper Tools
StageLive
ListedNovember 13, 2026