JSON Playground - Modern Developer Toolkit 9 essential tools in one privacy-first platform: • JSON Formatter with tree view & CSV export • JWT Debugger with HS256/RS256/ES256 support • Fake Data Generator (unlimited, no API limits) • HTML, Markdown, Base64, QR Codes, Crypto tools Why developers love it: ✅ 100% client-side - your data never leaves your browser ✅ No ads, no tracking, completely free ✅ Dark mode, modern UI, blazing fast ✅ Works offline as PWA