Online JSON Formatter

JSON Validator

Validate your JSON data instantly. This free online JSON Validator checks whether your JSON is correctly formatted and highlights errors clearly.

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How to Use the JSON Validator

Our JSON Validator helps you quickly check whether your JSON data is valid or contains errors. This tool is ideal for developers, testers, and anyone working with APIs or JSON files.

  1. Paste your JSON data into the input box.
  2. Click the Validate JSON button.
  3. The validator instantly checks your JSON syntax.
  4. If valid, you will see a success message.
  5. If invalid, the tool displays the exact error to help you fix it.

Once validated, you can safely use the JSON in your application, API, database, or configuration file.

JSON Validator – Frequently Asked Questions

What is a JSON Validator?

A JSON Validator is a tool that checks whether your JSON data follows the correct JSON format. It helps identify syntax errors such as missing commas, incorrect brackets, or invalid values.

Why should I validate JSON?

Validating JSON ensures your data can be parsed correctly by applications, APIs, and servers. Invalid JSON may cause errors, crashes, or failed API requests.

How do I know if my JSON is valid?

Paste your JSON into our JSON Validator and click the validate button. If valid, a confirmation message appears; otherwise, detailed error information is shown.

Can I validate large JSON files?

Yes, the JSON Validator supports large JSON files. Very large inputs may take slightly longer depending on your device.

Is this JSON Validator free to use?

Yes, this is a completely free online JSON Validator with no usage limits.