Invalid JSON

Understanding JSON validation errors

JSON validation errors occur when the provided JSON structure does not comply with standard JSON formatting rules.

Common JSON issues

  • Missing commas.

  • Trailing commas.

  • Unquoted property names.

  • Invalid brackets or braces.

  • Using single quotes instead of double quotes.

Example of invalid JSON 

{
  "name": "John",
  "email": "john@example.com",
}

The trailing comma after the last property makes this JSON invalid according to the JSON specification.

Correct JSON example

How to fix invalid JSON

Recommended checks

  • Validate commas and brackets carefully.

  • Use double quotes for property names and string values.

  • Remove trailing commas.

  • Check nested objects and arrays.

  • Validate the JSON with a formatter if necessary.

Local validation

JSON validation is performed entirely client-side inside the browser.

JSON content is never uploaded or transmitted to external servers during validation.