FAQ
Common questions about JSON Schema Validator.
What is a JSON schema validator?
A JSON schema validator checks whether a JSON document follows a defined structure. This tool focuses on syntax validation — it confirms your JSON is well-formed and can be parsed, then formats it for readability.
Do I need a schema file to use this?
No. This tool validates JSON syntax without any schema. It is ideal for quick checks before sending data to an API or pipeline.
What happens if my JSON is invalid?
You will see a clear error message indicating where the parsing failed, so you can fix the issue quickly.
Is my data safe?
Yes. All validation happens locally in your browser. Your JSON is never uploaded or stored.
Can I use this as a JSON DTD alternative?
JSON does not have a DTD like XML. This tool provides syntax validation and formatting, which covers the most common need for checking JSON before use.