JSON Formatter

Format and validate JSON. Paste minified JSON, get pretty-printed output.

Result
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How it works

  1. 1Paste any JSON string (minified or already formatted) into the input area.
  2. 2The tool parses the JSON and validates its structure.
  3. 3Valid JSON is reformatted with proper indentation and line breaks for readability.
  4. 4Invalid JSON displays an error with the parse position. Copy the formatted output when ready.

Example

Input: {"name":"Alice","age":30}
Output: {
  "name": "Alice",
  "age": 30
}