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JSON Formatter & Validator

Format, validate, and analyze JSON data with ease.

JSON Input

Formatted JSON

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Format your JSON to see the results here.

JSON Tips & Information

Common JSON Errors:

  • Missing or extra commas between elements
  • Using single quotes instead of double quotes
  • Trailing commas in arrays or objects
  • Unquoted property names
  • Using comments (JSON doesn't support comments)
  • Using undefined, NaN, or Infinity (not valid in JSON)

JSON Data Types:

  • string: Text in double quotes
  • number: Integer or floating point
  • boolean: true or false
  • null: null value
  • object: Collection of key/value pairs
  • array: Ordered list of values

JSON Example:

{ "name": "John Doe", "age": 30, "isEmployed": true, "address": { "street": "123 Main St", "city": "Anytown", "zipCode": "12345" }, "phoneNumbers": [ "555-1234", "555-5678" ], "spouse": null }

When to Use JSON:

  • API responses and requests
  • Configuration files
  • Data storage for simple applications
  • Data exchange between different programming languages
  • Browser storage (localStorage, sessionStorage)

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