Step-by-step
- Copy the complete JSON document.
- Paste it into a JSON validation or formatting tool.
- Run the validation.
- Read the reported error location or message.
- Check brackets, quotes, commas, and value types around that location.
What makes JSON valid?
Valid JSON uses double-quoted property names, supported JSON value types, matching braces and brackets, and correctly separated members.
Common JSON errors
Typical errors include single quotes around keys, missing commas, extra commas, unclosed arrays, and comments inside standard JSON.
Validation versus formatting
Formatting improves readability. Validation checks whether the input follows JSON syntax. A good formatter can often perform both jobs in one workflow.
Finish the task with DevUtilityKits
Use the relevant online utility, check the result, and continue with your development workflow.
Open JSON Formatter →