Toolwise

JSON Validator

Check whether your JSON is syntactically valid, with clear error reporting for quick fixes.

How to use JSON Validator

  1. 1Paste your JSON into the editor.
  2. 2Click Validate to check for syntax errors.
  3. 3Fix any reported issues and re-validate.

About JSON Validator

Before using JSON in an API, config file or database, it's worth confirming it actually parses. This validator checks your JSON and reports exactly where a syntax error occurs.

Benefits

  • • Catch malformed JSON before it breaks a build or API call.
  • • Get the specific error location instead of a generic parse failure.

Common mistakes

  • • Leaving a trailing comma after the last item in an array or object.
  • • Mixing up brackets — using [] for an object or {} for an array.

Frequently Asked Questions

No, this checks JSON syntax only (that it parses correctly), not conformance to a specific schema.

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