JSON validator
Validate JSON in the browser and report whether it parses, what top-level shape it contains, and where a syntax error appears when the browser provides an offset.
Local processing
Result
Your result will appear here
The input stays available if you need to adjust a setting.
How to use json validator
- 1
Paste the JSON to inspect.
- 2
Run validation.
- 3
Use the result or correct the reported syntax problem.
A realistic example
Find an unexpected comma in a configuration payload before committing it.
Supported formats and limits
Input: UTF-8 JSON text. Output: validation report.
- Error wording varies slightly between browser engines.
- Validation checks syntax, not an external JSON Schema.
Questions people ask
Does valid JSON mean the data is correct?
It means the syntax is valid; business rules require a separate schema or application check.
Is pasted JSON logged?
No. It remains in the current page memory.