What this JSON formatter does

The tool parses your input as standard JSON. If parsing succeeds, it can serialize the same data with consistent indentation or without optional whitespace. Validation checks syntax without executing any submitted content.

How to use it

1. Paste a JSON object, array, string, number, boolean or null into the input.
2. Choose two spaces, four spaces or tabs for formatted output.
3. Select Format JSON, Minify or Validate.
4. Review the status message, then copy or download valid output if needed.

JSON input and output example

An input such as {"name":"ToolNovaX","active":true} becomes:

{
  "name": "ToolNovaX",
  "active": true
}

What JSON validation means

Validation confirms that the text can be parsed according to JSON syntax. It does not check a business schema, verify that property names are correct for an API, or prove that the data is trustworthy.

Common JSON errors

• Missing commas between properties or array values
• Trailing commas after the final item
• Single quotes instead of double quotes
• Unquoted property names
• JavaScript comments, functions, undefined or NaN
• Unescaped control characters inside strings

Methodology

The implementation uses the browser’s native JSON.parse to validate and convert input, then JSON.stringify for formatted or minified output. It never uses eval and does not execute input as code.

Limitations

Formatting may normalize insignificant whitespace. Duplicate object keys are not reliably reported because standard parsing retains one value. Very large documents can consume significant memory, so the interface applies a 2 MB text safeguard. This is a syntax tool, not a JSON Schema validator.