Free JSON Validator
Validate JSON syntax and detect errors. Get clear error messages with position info. Also shows JSON structure overview.
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💻 JSON Validator
Frequently Asked Questions
It checks that your JSON follows the correct syntax: properly quoted strings, correct use of brackets and braces, valid data types, no trailing commas, and properly escaped characters.
Common JSON errors include: trailing commas after the last item, single quotes instead of double quotes, unquoted keys, or missing commas between items. The error message shows the exact position of the problem.