Free JSON formatter, validator and minifier. Beautify, minify and validate JSON with developer-grade output. Private and browser-based.
Malformed JSON is a common cause of API failures and silent data loss. Validating catches missing commas, quotes and brackets before they break something.
Minify removes all whitespace and newlines so the JSON is smaller for transfer and storage, while staying 100% valid.
No. Formatting, validating, minifying and TypeScript generation all happen in your browser with native JavaScript.
Yes. Paste JSON and click “TypeScript types” to get ready-to-use interfaces inferred from your data — a feature many tools charge for.