How to validate JSON
Paste the document and select Validate JSON. The tool reports whether the syntax can be parsed and shows the browser parser's error when it cannot.
Common JSON errors
JSON requires double-quoted property names, balanced braces and brackets, and no trailing commas. Comments are not part of the JSON standard.
Frequently asked questions
What makes JSON invalid?
Common errors include trailing commas, missing quotes, and unmatched brackets.
Is validation performed locally?
Yes. Your JSON is parsed in your browser.