JSON Syntax Error
An error that occurs when a JSON document does not follow the strict grammatical rules of the JSON format.
Syntax errors are the most common issue when working with JSON, especially when writing it manually. A single misplaced comma or quote will cause the entire document to be invalid, leading to a parsing failure.
Common Syntax Errors
- Trailing Commas: Adding a comma after the last element in an object or array (e.g.,
{ "key": "value", }). - Single Quotes: Using single quotes (
') instead of double quotes (") for keys and strings. - Unquoted Keys: Forgetting to wrap keys in an object with double quotes.
- Missing Commas: Forgetting to place a comma between key/value pairs in an object or between elements in an array.
A JSON validator is the best tool to quickly find and fix these errors.