What causes "Unexpected token } in JSON"?

This error usually means there is a trailing comma before the closing brace (e.g. {"a":1,}), the JSON contains comments (not valid in JSON), or a JavaScript object literal with unquoted keys was used instead of valid JSON.

How do I fix "Unexpected token } in JSON" error?

Paste your JSON into the fixer above. It detects trailing commas, comments, and unquoted keys, and removes them automatically to produce valid JSON.

Are trailing commas allowed in JSON?

No. JSON does not allow trailing commas after the last element in an array or object. This is a common mistake when converting JavaScript code to JSON. The JSON fixer removes trailing commas automatically.

Free Guide: Fix "Unexpected token } in JSON" Error

The "Unexpected token } in JSON" error typically occurs when there's a trailing comma before a closing brace, or when JSON structure is malformed. This is one of the most common JSON syntax errors.

Common Causes

Trailing comma before closing brace }
Trailing comma before closing bracket ]
Extra commas in JSON structure
Missing quotes around keys or values

Broken JSON Example

❌ Broken JSON (Trailing Comma):

{
  "name": "John",
  "age": 30,  ← Trailing comma error
}

Error: Unexpected token } in JSON at position 45

✅ Fixed JSON:

{
  "name": "John",
  "age": 30
}

Fix This Error Instantly — Try It Below

Paste your broken JSON and click Fix — our tool auto-repairs unexpected token errors in seconds.

Advanced JSON Fixer & Recovery Engine

Paste → Instant fix. Repair malformed JSON: trailing commas, missing quotes, broken arrays, AI-generated JSON — 100% client-side

Repair options

Repair truncated JSONFix unquoted keys (JS → JSON)Fix missing quotes (data": → "data":)Fix missing colons ("key"value → "key":value)Multiple objects → arrayExtract JSON from logs

Fix from API error

Paste an error like "Unexpected token } in JSON at position 245" to highlight the position.

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JSON Input

Fixed JSON Output

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JSON Fixer Features

Automatic Error Detection

Scans and identifies all JSON syntax errors automatically

Smart JSON Repair

Fixes common errors like trailing commas, single quotes, and unquoted keys

Precise Error Location

Shows exact line and column numbers for each error

Visual Error Highlighting

Highlights problematic lines with color-coded indicators

Fix "Unexpected token } in JSON" Error