JSON.parse() is one of the most commonly used JavaScript functions, but it throws errors when given invalid JSON. Learning how to handle these errors properly is essential for robust applications.

In this guide, we'll show you how to fix JSON.parse() errors in JavaScript, with proper error handling examples and our free JSON Fixer toolto validate JSON before parsing.

Common JSON.parse() Errors

SyntaxError: Unexpected token } in JSON

Usually caused by trailing commas or syntax errors.

SyntaxError: Unexpected end of JSON input

JSON is incomplete or missing closing braces.

SyntaxError: Unexpected token < in JSON

HTML was returned instead of JSON (API error).

Proper Error Handling with Try-Catch

Always wrap JSON.parse() in a try-catch block:

try {
  const jsonString = '{"name": "John", "age": 30}';
  const data = JSON.parse(jsonString);
  console.log(data);
} catch (error) {
  if (error instanceof SyntaxError) {
    console.error('Invalid JSON:', error.message);
    // Use JSON Fixer to fix it
  } else {
    console.error('Unexpected error:', error);
  }
}

Validate JSON Before Parsing

Validate JSON using our free JSON Validator before parsing:

💡 Best Practice:

Validate JSON using our JSON Validator
If invalid, use our JSON Fixer to repair it
Then parse the fixed JSON in your code

Fix JSON.parse() Errors Instantly

Use our free JSON Fixer to validate and repair JSON before using JSON.parse() in your JavaScript code.

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