JSON Formatter

Format and validate JSON — pretty-print with configurable indentation or minify to a single line.

Input

• A JSON string (object, array, string, number, boolean, or null)
• May be already formatted or a single minified line
• Optional action: format (default), minify, or validate-only
• Optional indent size: 2 (default) or 4 spaces

Output

• format: Pretty-printed JSON with proper indentation and line breaks
• minify: Single-line compact JSON with no whitespace
• validate: A message confirming valid or invalid JSON (with error details)

Instructions