About JSONValidator.in
JSONValidator.in is a focused toolkit for working with JSON: validating it, formatting it, and repairing it when it breaks. It's built the way we'd want a developer tool to work — fast, free, and honest about what it does with your data.
Privacy by architecture
Every tool runs entirely client-side. Your JSON is parsed, formatted, and repaired in your browser's own JavaScript engine — it's never sent to a server, logged, or stored.
Built for speed
No sign-up, no ads blocking the tool, no waiting on a network round-trip. Paste your JSON and get an answer immediately.
Built to scale with you
We're building out the rest of the JSON toolkit — converters, schema tools, diffing — on the same foundation: fast, accurate, and honest about what's actually implemented.