✅ JSON Validator

Instantly validate your JSON and find syntax errors.

JSON Validator — Check JSON Syntax Online

Our JSON Validator checks your JSON data for syntax errors in real time. Paste your JSON into the text area and instantly see whether it is valid or invalid. If invalid, the exact error message and position is shown so you can quickly locate and fix the problem. This is invaluable when working with API responses, config files, or any JSON data source.

Common JSON Errors

Trailing commas

JSON does not allow trailing commas after the last item in an array or object.

Single quotes

JSON requires double quotes for strings. Single quotes are not valid.

Unquoted keys

All keys in JSON objects must be enclosed in double quotes.

Missing brackets

Every opening brace { or bracket [ must have a matching closing } or ].