JSON Validator Online

Example:
{ "name": "John", "age": 30, "city": "NYC" }
Validate JSON syntax instantly. Our JSON validator catches common errors like missing commas, unclosed brackets, and trailing commas.
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FAQs

What are common JSON errors?

Missing commas, trailing commas (not allowed in JSON), unquoted keys, single quotes instead of double quotes.

Is JSON the same as JavaScript object literal?

Similar but different. JSON requires double quotes for keys, no trailing commas, no functions/undefined.