Hey Product Hunt! I'm the solo developer behind SafeJSON. I built this after the jsonformatter.org breach in November 2025 — security researchers found over 80,000 credentials (AWS keys, GitHub tokens, banking details) publicly exposed through an unprotected feature. The root cause: server-side processing. SafeJSON does everything in your browser. Open DevTools → Network tab while using it — zero requests. Your data literally never leaves your device. What's included: - JSON Formatter & Validator (free forever) - JSON Diff — side-by-side comparison with color-coded changes - JWT Decoder — decode tokens without sending them to a server - JSONPath Query & Schema Validator - Browser extension (Edge Add-ons) Built with Next.js + Tailwind. MIT licensed. Entire codebase on GitHub. I'd love feedback on what to build next. What's the one JSON-related task you do manually that you wish was automated?

SafeJSON

Verifiable browser-local JSON toolkit

Verifiable browser-local JSON toolkit