Beautify, minify, and validate JSON in your browser. Convert JSON to TypeScript interfaces, Python dataclasses, Go structs, and SQL table schemas — instantly, no server.
🚀 Launch Free Tool →✅ JSON prettify with 2/4 space indent
✅ JSON minify / compress
✅ JSON Schema validation
✅ Convert to TypeScript, Python, Go
✅ SQL table schema generation
Common issues: trailing commas (not allowed in JSON), single quotes instead of double quotes, unquoted keys, or comments (not supported in JSON). This tool highlights the exact error line.
JSON5 is a relaxed superset of JSON that allows comments, trailing commas, and single quotes. Standard JSON parsers reject JSON5 syntax.
Paste your JSON and click 'Convert to TypeScript'. The tool auto-detects types and generates a typed interface including nested objects and arrays.