JSON Validator
Runs locally
Paste JSON to instantly check whether it's syntactically valid, with an approximate location for any error found.
0 / 5,000,000
Result
Enter JSON above to validate it.
Your data is processed locally in your browser and is not uploaded.
Learn more about this tool⌄
How it works
Validation uses the browser's native JSON.parse and reports any parsing error.
Common use cases
- Verifying hand-written JSON before deploying config
- Debugging API payloads
- Teaching JSON syntax
Frequently asked questions
- Does this check my JSON against a schema?
- No, this checks syntax only, not structure against a schema.