JSON to TypeScript
Generate TypeScript interfaces from a JSON sample.
JSON Formatter
Prettify and validate JSON with syntax highlighting.
Runs locally in your browser. No data is sent to a server.
About JSON Formatter
Paste raw or minified JSON to format it with 2-space, 4-space, or tab indentation, or strip all whitespace to produce a compact single-line result. Validates structure using the browser's native JSON parser and reports clear error messages so you can pinpoint exactly what's wrong. Everything runs locally in your browser — your JSON never leaves your machine.