Fix "Unexpected end of JSON input" Error

The "Unexpected end of JSON input" error is one of the most common JSON parsing errors. It occurs when JavaScript's JSON.parse() function receives incomplete or truncated JSON data.

This error typically means your JSON is missing closing braces, brackets, or is incomplete. In this guide, we'll show you exactly what causes this error and how to fix it instantly using our free JSON Fixer tool.

What Does "Unexpected end of JSON input" Mean?

This error occurs when the JSON parser reaches the end of the input string before finding all required closing characters. The parser expects more data but finds nothing, causing the error.

💡 Common Causes:

Missing closing brace } or bracket ]
Incomplete JSON string (truncated data)
Empty string passed to JSON.parse()
Network request that didn't complete
File read that was cut off

Broken JSON Example

Here's a typical example of JSON that causes the "Unexpected end of JSON input" error:

❌ Broken JSON (Missing Closing Brace):

{
  "users": [
    {
      "name": "John",
      "age": 30
    }
  ]
  ← Missing closing brace here

Error: Unexpected end of JSON input

✅ Fixed JSON:

{
  "users": [
    {
      "name": "John",
      "age": 30
    }
  ]
}

How to Fix "Unexpected end of JSON input" Error

Check for Missing Closing Braces/Brackets

Count all opening braces { and brackets [ and ensure they have matching closing braces } and brackets ].

Verify JSON Completeness

Ensure your JSON string is complete and not truncated. Check if network requests completed successfully or if file reads finished.

Use Our Free JSON Fixer

Paste your broken JSON into our JSON Fixer tool. It automatically detects missing braces and fixes the error instantly.

JavaScript Code Example

Here's how to handle this error in your JavaScript code:

try {
  const jsonString = '{"name": "John", "age": 30'; // Missing closing brace
  const data = JSON.parse(jsonString);
} catch (error) {
  if (error.message === 'Unexpected end of JSON input') {
    console.error('JSON is incomplete or missing closing braces');
    // Use our JSON Fixer to fix it automatically
  }
}

Fix This Error Instantly

Don't waste time manually fixing JSON errors. Our free JSON Fixer automatically detects and repairs "Unexpected end of JSON input" errors in seconds.

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FAQ

Why do I get "Unexpected end of JSON input"?

This error occurs when your JSON is incomplete - usually missing closing braces, brackets, or the JSON string is truncated.

How can I prevent this error?

Always validate JSON before parsing, ensure network requests complete, and use our JSON Fixer to check for errors.

Can I fix this error automatically?

Yes! Our free JSON Fixer tool automatically detects and fixes missing closing braces and other JSON errors.