JSON Validator

Validate JSON and get a precise error message with the line and position when something is wrong, plus a summary of your data.

Your data is validated locally in your browser and never uploaded.

How to use JSON Validator

  1. Paste the JSON you want to check.
  2. The result appears instantly — valid, or an error with the position.
  3. For valid JSON, view a summary of its structure.

About this tool

A single misplaced comma can break an entire integration. The validator checks your JSON against the official grammar and reports exactly what is wrong and where, so you can fix it in seconds.

Frequently asked questions

What counts as valid JSON?
Double-quoted keys, no trailing commas, no comments, and only the supported value types: string, number, boolean, null, object and array.
Does the validator tell me where the error is?
Yes. When possible it reports the line and column, which is usually enough to spot the problem immediately.

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