Result will appear here...Common errors: trailing commas after the last item, single quotes instead of double quotes, unquoted keys, or missing closing brackets. JSON is strict — even one character out of place breaks it.
Minification removes all whitespace, newlines, and indentation to create the smallest possible JSON string. This is useful for reducing payload size in API requests.
LLMs sometimes add markdown code fences or extra text. Use Regex to extract the JSON block first, then validate it. Our tool shows exact error positions to help you debug.
Yes. All formatting happens client-side in your browser. We never send your JSON to any server.
Validate and pretty-print a JSON payload or compact it for copying.