How it works
Paste your JSON and press Format to indent it, or Minify to strip whitespace. If the JSON is invalid, the parser error message tells you what went wrong and roughly where.
Frequently asked questions
Is my JSON uploaded anywhere?
No. Parsing happens in your browser with JSON.parse.
Why does it say Unexpected token?
Common causes are trailing commas, single quotes instead of double quotes, or unquoted keys.