How can I debug a "JSON Parse Error: Unexpected token" in JavaScript?

Debugging involves pinpointing the exact location of the error. Use your browser's developer tools (Console tab) to inspect the JSON string being parsed. Console.log the JSON string *before* parsing it. JSON validators (online tools) can also help identify syntax errors. If the JSON comes from an API, check the API response headers to ensure the content type is set to 'application/json'. Look closely at the line number indicated in the error message.