Web Tools
JSON Repair
Fix broken JSON from AI outputs — trailing commas, single quotes, missing brackets, and comments
Processed locally in your browser
Free
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Input (Broken JSON)
Paste your broken JSON here. Press Ctrl+Enter to repair.
Output (Repaired JSON)
What Gets Fixed
Trailing commas before } and ]
Single quotes to double quotes
Unquoted object keys
JavaScript comments (// and /* */)
Missing closing brackets and braces
undefined and NaN to null
All processing happens entirely in your browser. No data is sent to any server.