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Toolkernel JSON Formatter is a free, privacy-first JSON tool that runs entirely in your browser.
✨ Format & beautify minified JSON with syntax highlighting
✅ Validate syntax with exact line & column error positions
⚖️ Compare two JSON files side-by-side with smart diff
🔧 Auto-fix common errors (trailing commas, missing quotes)
📦 Minify JSON for production
🔄 Generate TypeScript interfaces from JSON
🔍 Search within large JSON structures
JSON Formatter OnlineFormat, diff & fix JSON without uploading anything
AJIT SINGH RATHOREleft a comment
Hey hunters! 🎯 As a developer, I format JSON dozens of times a day—API responses, config files, debugging payloads. But I never felt comfortable pasting production data into online tools. So I built a JSON formatter that processes everything client-side. Zero data transmission. Features: → Format/beautify with customizable indentation → Validate with precise error locations → Compare two JSONs...
JSON Formatter OnlineFormat, diff & fix JSON without uploading anything