JSON Validator
Check whether your JSON is valid and see what's wrong if it isn't.
DeveloperResult
Result
Valid JSON ✓
- Type
- Object
- Keys
- 3
How does it work?
Paste your JSON and press Validate. If it's valid you get its type (object, array…) and its key or item count; if not, the first error the browser found and where it is. Everything happens in your browser. For a tidy layout, use the JSON Formatter.
Example
JSON: {"name":"Calciyums","tools":[1,2,3],"free":true} → Result: Valid JSON ✓
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Frequently asked questions
Why is my JSON invalid?
The usual culprits are trailing commas, single quotes, unquoted keys, comments and missing brackets.
Is my data sent to a server?
No. The JSON is processed in your browser and never leaves your device.