JSON Validator

Validate your JSON data structure to ensure it is syntactically correct and well-formed.

Home JSON Validator
Our free JSON Validator checks your JSON code against standard syntax rules, identifying errors, missing commas, or incorrect formatting. Ensure your API payloads and configuration files are 100% correct. Validate your JSON now!

Paste your JSON here to validate. Example: {"name": "John", "age": 30}

JSON Validator

  1. 1 Enter JSON: Paste your JSON data string into the input area.
  2. 2 Validate: Click "Check JSON Syntax".
  3. 3 View Status: The tool instantly reports whether the JSON is valid (well-formed syntax) or highlights the exact line and character where a syntax error occurred.

What kind of errors does a JSON validator check for?

It checks for syntax errors, such as missing commas, incorrect bracket/brace placement, unclosed quotes, or invalid property names.

Does it check the data schema?

No, it only checks the syntax. It does not check if the data type (e.g., number vs. string) or structure (schema) meets specific requirements for an application.

Why do I get a 500 error on my API when I send JSON?

A 500 error can often be traced back to an invalid JSON payload. Using this validator before sending the request can eliminate this common cause.

API Request Testing

Example Keyword: validate JSON before API call
Ensure the data you are sending to a web service is perfectly formatted, preventing server-side errors.

Configuration Debugging

Example Keyword: check json config file syntax
Verify that local configuration files for tools like Webpack or ESLint are syntactically valid.

Code Generation Check

Example Keyword: json syntax error finder
Validate the output of a script or function that dynamically generates JSON data before it's used.

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