JSON Repair
Automatically fix broken JSON: trailing commas, single quotes, unquoted keys, JS comments, undefined/NaN, and unclosed brackets.
#json#repair#fix#validate#broken json#trailing comma#developer
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How to use
- 1Paste your broken JSON into the input (trailing commas, single quotes, etc.)
- 2Click "Process" — the tool automatically detects and fixes errors
- 3Check the list of applied fixes in the metadata section
- 4Copy the repaired, valid JSON
Frequently Asked Questions — JSON Repair
What types of errors can be fixed?+
Trailing commas, single quotes instead of double quotes, unquoted keys, JavaScript-style comments (// and /* */), undefined/NaN/Infinity literals, and unclosed brackets or braces.
What if the JSON is too broken to fix?+
The tool makes its best effort, but if the JSON is completely structureless, it will report a specific error message explaining what it could not fix.
Where does this commonly happen?+
Common sources: copying JSON from terminal logs (which add comments), JavaScript object literals pasted as JSON, or truncated API responses.
Is my data safe?+
Yes. All processing happens entirely in your browser. Nothing is sent to any server.