How to use this tool
- Paste the JSON you want to check.
- Choose Validate to see whether the syntax parses or get an error message.
When it comes in handy
A syntax check can quickly find missing commas, quotation marks and unmatched brackets.
Frequently asked questions
Is this tool free?
Yes. You can use it without creating an account or paying a subscription.
Is my data uploaded?
The processing happens locally in your browser. Your tool inputs and files are not sent to our server.
What should I know about the result?
This checks JSON syntax, not a JSON Schema, business rules or duplicate keys. Valid syntax does not mean the data is correct for your application.