Check JSON syntax, find formatting errors, and confirm whether your JSON data is valid. Paste your JSON, validate it instantly, then copy formatted or minified output when the structure is correct.
Validate API responses, configuration files, schemas, app settings, and JSON snippets directly in your browser.
Paste JSON code below to validate syntax, detect errors, format valid JSON, or create compact minified JSON.
Paste JSON code and click Validate JSON to check syntax.
JSON syntax must be correct before it can work in APIs, apps, databases, and configuration files.
Quickly confirm whether your JSON object, array, API response, or configuration data is valid.
Detect common JSON problems like missing commas, broken quotes, extra brackets, and invalid values.
Your JSON is processed locally in your browser, making it useful for testing sensitive drafts and API data.
JSON validation checks whether JSON data follows the correct syntax rules. A valid JSON file must use proper quotes, commas, brackets, braces, arrays, objects, strings, numbers, booleans, and null values.
This is important because even one missing comma or extra bracket can break an API response, app setting, schema, or configuration file. A validator helps catch those mistakes before you use the JSON in a live project.
Validate JSON data in three simple steps.
Add your JSON object, array, API response, app setting, schema, or configuration data into the input editor.
Click the validate button to check whether the JSON is valid or contains syntax errors.
If the JSON is valid, you can beautify it for readability or minify it for compact storage and sharing.
Common questions about checking, validating, and fixing JSON syntax online.