Developer tool

JSON Validator

Check JSON syntax and locate the parse error without sending data anywhere.

Runs in your browser

JSON Validatorworks locally

JSON to validate

Result

✓ Valid JSON

Top-level type: object
Top-level items: 2
UTF-8 bytes: 47

Normalized JSON:
{
  "tool": "JSON Validator",
  "valid": true
}

How to use this JSON validator

Paste the source text or code, then choose the conversion or formatting mode.
Review the validation result and reported error location. Check syntax, escaping, and edge cases against the source before using the result in a live project.
Check the output against the source, then copy or download the finished result.

Use the JSON Validator to check JSON syntax and locate the parse error without sending data anywhere. Change the inputs to compare another result.

You can also use it to check source text for structural or syntax problems.

Paste JSON with a missing comma or closing brace to locate the parse error before using it in an API request.