JSON Repair Online — Fix Invalid JSON Syntax
Repair malformed JSON with trailing commas, unquoted keys, or minor syntax issues. Review the output before production — then validate with our JSON validator.
Developer notes
• Repair runs automatically after you pause typing. • Output must parse as valid JSON — semantic meaning is not guaranteed. • Follow with the JSON validator before production commits. • For clean formatting only, use the JSON formatter instead.
When teams use repair
• Salvage hand-edited config snippets with trailing commas. • Quick-fix logs or copy-paste accidents before validation. • Unblock local testing when upstream exports slightly invalid JSON.
Examples
Trailing comma
Broken input
Repaired output
Unquoted keys
Broken input
Repaired output
Next steps
Validate repaired JSON with the JSON validator, prettify via the JSON formatter, or compare versions with JSON diff.
JSON repair FAQ
Syntax fixes, not semantic guarantees
Can repair change meaning?
Yes — it fixes syntax, not business logic. Review diffs before shipping.
What if repair fails?
Use the JSON validator for precise error locations — some payloads need manual editing.
Is data uploaded?
Never — jsonrepair runs locally after dynamic import.
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