JSON Validator
Validate, format, and auto-fix broken JSON with AI.
load example:
Invalid JSON
1
2
3
4
5
6
7
8
9
10
Syntax Error
Line 8Col 3
Unexpected token ']', ..."aming", ], "acti"... is not valid JSON
Line 8
],
to unlock AI auto-fix.
Common JSON mistakes
Trailing comma
{ "a": 1, }→ Remove last comma
Single quotes
{ 'key': 'val' }→ Use double quotes
Unquoted keys
{ key: "val" }→ Quote all keys
Comments
{ // comment
"a": 1 }→ Remove comments
undefined / NaN
{ "a": undefined }→ Use null instead