JSON Validator is a free online developer tool to validate JSON data against the JSON specification as known as JSON linter instantly.
You can either browse a JSON file locally from your device, fetch JSON data from an API, or enter it manually.
Once you've entered JSON data, click the validate button to check if the input JSON data is valid. If so, the success message will be displayed accordingly.
Otherwise, the errors including line numbers and excerpt code will be printed so that you can get them fixed easily.