JSON error reference
Trailing comma in JSON
Strict JSON does not allow a comma after the final property or array item.
01
Why it happens
- A comma remains before a closing brace
- A comma remains before a closing bracket
- The content was copied from a JavaScript object literal
02
Guide
Invalid
{
"active": true,
}Valid
{
"active": true
}03
Common parser messages
Unexpected token }Expected double-quoted property nameProperty name expected04
How to fix it
- 1
Locate the closing brace or bracket near the parser position.
- 2
Remove only the final comma.
- 3
Check nested arrays and objects for the same pattern.
- 4
Format the result after validation.
