JSON Formatter Online
What is JSON formatting?
JSON (JavaScript Object Notation) is the lingua franca of modern web APIs. A JSON formatter takes a compact or messy JSON payload and rewrites it with consistent indentation, sorted whitespace, and line breaks that make the structure easy to scan. Json Pod's formatter parses the document with the same engine your browser uses for JSON.parse, so what you see is exactly what your application will receive.
How to validate JSON
Paste your JSON into the input panel. The validator runs on every keystroke and reports any syntax error — usually an unexpected token, missing comma, or unterminated string — together with the line and column where it occurred. Click Format to pretty-print or Minify to strip whitespace for transport.
Common JSON errors
- Trailing commas — valid JavaScript, invalid JSON.
- Single quotes — JSON strings must use double quotes.
- Unquoted keys — every object key must be a string.
- NaN / Infinity / undefined — not part of the JSON spec.
- Comments — JSON has none; use JSON5 instead.
JSON vs minified JSON
Pretty-printed JSON is for humans — line breaks and indentation make diffs and debugging practical. Minified JSON is for the wire — every byte counts when payloads cross networks or live in URLs. Use the Minify action for production responses, the Format action for code review.