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JSON is formatted using standard indentation (2 or 4 spaces). Objects and arrays are expanded with proper nesting. Keys are kept in original order.
The formatter validates JSON against RFC 8259 standard. It detects common issues like trailing commas, single quotes, unquoted keys, and comments (which are not valid JSON).
Formula: IETF RFC 8259
Minification removes all non-essential whitespace, line breaks, and indentation while preserving valid structure. Output size shrinks for production APIs and network transfers without changing parsed data.
Updated: July 2026
Paste a minified API response to see its structure clearly. Useful when debugging REST APIs or inspecting network responses.
→ Formatted, indented JSON with syntax highlighting
Format a messy package.json or tsconfig.json with consistent indentation before committing to version control.
→ Clean, readable config with 2-space indentation
A developer receives a compressed JSON webhook body from Stripe or GitHub and formats it to trace nested event fields.
→ Expanded tree with clear key-value hierarchy for debugging
JSON requires double quotes for all strings and keys. Use: {"key": "value"} not {'key': 'value'}
JSON does not allow trailing commas. Remove the comma after the last element: [1, 2, 3] not [1, 2, 3,]
Turn minified or messy JSON into readable, indented output in one click. Paste API responses, config files, or log data to validate syntax, spot errors, and copy formatted results for debugging or documentation.