Free JSON Validator
JSON Validator is a simple online tool for checking whether JSON data follows valid JSON syntax. It can be useful when working with APIs, configuration files, web applications and structured data.
How to Validate JSON
- Paste your JSON into the editor.
- Click the Validate JSON button.
- The tool checks the JSON syntax in your browser.
- If an error is detected, an error message is displayed.
Common JSON Errors
Common JSON problems include missing commas, unmatched braces, incorrect quotation marks, invalid values and improperly structured objects or arrays.
JSON Validator for Developers
Validating JSON before sending it to an API or using it in an application can help identify syntax problems early. This tool provides a quick browser-based way to check JSON without installing additional software.
Frequently Asked Questions
A JSON Validator checks whether JSON text can be parsed as valid JSON according to JSON syntax rules.
Your JSON may contain a missing comma, incorrect quote, unmatched bracket, invalid value or another syntax error.
No. Validation only checks the JSON. Use Format JSON if you want to create a more readable version.
No server-side processing is required. Validation is performed directly in your browser.
Yes. The validator is designed with a responsive, mobile-friendly interface.