What is JSON Formatter?

Unformatted JSON is the most common friction point in API debugging. A minified payload from a Stripe webhook, a Kubernetes ConfigMap response, or a raw database record can be thousands of characters on a single line — impossible to read without a formatter. This tool parses your JSON string using the browser’s native JSON.parse() engine — the same parser your application code uses — and rebuilds it with consistent 2-space indentation and syntax highlighting. Because it runs locally, you can safely paste API tokens, internal config payloads, and customer data without that content touching a third-party server. **Validation on every keystroke** — The formatter validates as you type. Missing commas, trailing commas (invalid in standard JSON), unquoted keys, and mismatched brackets are all caught and highlighted with the exact line number where the parser failed. **Minification** — The reverse operation is also available. Minify strips all whitespace to produce the smallest possible JSON string — useful before pasting into an environment variable, a config field with a character limit, or a URL query parameter. **Sort keys** — Optionally sort object keys alphabetically, which makes it easier to diff two JSON objects manually or spot a missing field across similar payloads.