TOOLS IM

JSON Validator

Check whether JSON is valid and find the exact location of errors.

Your data is processed in your browser and is not uploaded to our servers.

About the JSON Validator

JSON Validator checks JSON syntax against the standard and reports the line and column of any error, such as trailing commas, missing quotes or unbalanced brackets. Valid JSON is also shown neatly formatted.

How to use the JSON Validator

  1. Paste the JSON to check.
  2. Click "Validate JSON".
  3. Fix any reported error and validate again.

Frequently asked questions

What are the most common JSON errors?

Trailing commas, single quotes instead of double quotes, unquoted keys and comments, which standard JSON does not allow.

Does it validate against a schema?

No, it checks syntax only.