Developer ToolsCode ValidatorsFree Tool
JSON Validator
Validate JSON syntax in your browser using the same parser JavaScript itself uses, with the exact error message if parsing fails.
How to Use JSON Validator
- 1Paste your JSON
- 2Click Process
- 3Read 'Valid JSON!' or the specific parse error
Frequently Asked Questions
It runs your input through the browser's native JSON.parse() — the same parser JavaScript itself uses. If parsing succeeds, it shows 'Valid JSON!'; if it fails, it shows the exact error message the parser reports.
No — this only checks that the JSON is syntactically well-formed (correct brackets, quotes, commas). To validate the actual field structure/types against rules, use the JSON Schema Validator instead.
It shows whatever position information the native JSON.parse() error message includes, which varies by browser but generally includes the character position.
No — parsing happens entirely in your browser; nothing is uploaded to a server.
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