JSON Validator
Validate JSON online, find syntax errors and check JSON structure instantly in your browser.
JSON Validator Tool
Paste JSON data below to check whether it is valid. The tool shows syntax errors, root type, keys, arrays, objects and JSON size instantly.
Waiting for JSON
Validation Summary
About This Tool
JSON Validator is a free online developer tool that helps you check whether JSON data is valid or invalid.
You can paste JSON from an API response, configuration file, database export, webhook payload or application data and instantly see whether the syntax is correct. The tool also shows useful information such as root type, number of keys, objects, arrays, characters, lines and file size.
This tool is useful for developers, API testers, students, data analysts and anyone working with JSON data.
How to Use JSON Validator
1. Paste your JSON into the input box.
2. The tool will validate the JSON automatically.
3. If the JSON is valid, you will see a success message and JSON statistics.
4. If the JSON is invalid, you will see the syntax error message.
5. Use Format JSON to beautify valid JSON or Copy JSON to copy your data.
Frequently Asked Questions
Is this JSON Validator free?
Yes. This JSON Validator is free to use and does not require signup.
Can this tool find JSON syntax errors?
Yes. If your JSON is invalid, the tool shows the syntax error message so you can fix the problem.
Does JSON require double quotes?
Yes. Standard JSON requires double quotes around object keys and string values.
Does this tool upload my JSON to the server?
No. This tool validates your JSON directly in your browser using JavaScript.