Every developer has seen it — the dreaded SyntaxError: Unexpected token when parsing JSON. A missing comma, a trailing comma, unquoted keys, or single quotes instead of double quotes. You know the fix is simple, but finding it in a 500-line JSON response is painful.

The Problem with JSON Validators

Tools like JSONLint tell you what's wrong — "Error at line 47, position 12." Great. Now you get to manually hunt through nested brackets to find that one missing comma.

What if a tool could just... fix it for you?

Auto-Fix JSON — The Approach