JSON Validator
Validate your code, data, or content instantly with our free json validator. Check for errors, security issues, and formatting problems. All validation happens in your browser.
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How It Works
- Paste your JSON payload into the editor.
- Click "Validate JSON" to lint the code.
- If valid, you will see a success message.
- If invalid, the tool highlights the exact line number and error reason.
Use Cases
- Debugging "500 Internal Server Errors" caused by bad payloads
- Verifying configuration files before deployment
- Learning correct JSON syntax nuances
- Testing API mocked responses
Frequently Asked Questions
Difference between JSON and JS Objects?
JSON is stricter. Keys must be in double quotes ("key"), and trailing commas are not allowed.
Does it format the output?
This tool focuses on validation. For pretty-printing, check out our JSON Formatter.
Why is my JSON invalid?
Common reasons include trailing commas, single quotes instead of double, or unclosed brackets.
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