JSON Toolkit
Free Online Tool

JSON Validator

Validate JSON online instantly and find syntax errors in your JSON data.

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Validate your JSON

Paste your JSON below and check whether it is valid.

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What is a JSON Validator?

A JSON Validator checks whether a JSON document follows the correct JSON syntax. It can help identify missing commas, incorrect quotation marks, missing brackets, and other common JSON errors.

How to validate JSON

  1. Paste your JSON into the editor.
  2. Click Validate JSON.
  3. If the JSON is valid, you will see a success message.
  4. If it is invalid, the tool will display the JavaScript parsing error.

Common JSON errors

  • Missing commas between properties.
  • Using single quotes instead of double quotes.
  • Missing closing brackets or braces.
  • Adding an extra comma at the end of an object.
  • Using invalid values or syntax.

Is this JSON Validator free?

Yes. JSON Toolkit's JSON Validator is free to use directly in your browser.

Is my JSON uploaded?

No. Validation is performed directly in your browser. Your JSON is not sent to a server by this tool.

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