Common JSON Formatting and Validation Errors

Trailing commas

This example is invalid JSON. JavaScript objects may allow trailing commas in some places, but JSON does not.

{
  "name": "Ada",
}

Single quotes and comments

JSON strings must use double quotes. Comments are useful in some JavaScript-like config formats, but they are not part of standard JSON.

Unescaped line breaks

Strings cannot contain raw line breaks. Use escaped sequences when a newline is part of a value.