Format, minify and validate JSON while preserving the exact text of numbers.
Paste JSON and choose Format JSON for two-space indentation, or Minify to remove whitespace outside strings. Objects, arrays and valid JSON primitive values are supported.
Input {"id":9007199254740993} keeps the complete number 9007199254740993 in the output.
Use double quotes for keys and strings. Comments and trailing commas are not supported. Formatting preserves number tokens, including integers beyond JavaScript’s safe integer range.
Why does validation fail? Single quotes, missing commas and JavaScript values such as undefined are common causes. Use the error location to inspect the source.