Does this fix invalid JSON automatically?

No, it only reports where the problem is — use the JSON Formatter once your JSON is valid to pretty-print it.

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JSON Validator

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JSON Validator

Check whether a JSON document is syntactically valid and pinpoint the error.

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Paste JSON

About this tool

Paste JSON to instantly confirm whether it parses correctly. If it does not, the validator surfaces the native parser error message along with the approximate line and column, which is usually enough to spot a missing comma or unclosed bracket.

Examples

{"a": 1,} is invalid because of the trailing comma.

Frequently asked questions

Related utilities

JSON FormatterPretty-print minified or messy JSON with 2 or 4-space indentation.JSON DiffCompare two JSON documents and see added, removed and changed keys.JSON ViewerExplore JSON as a collapsible, color-coded tree.JSON MinifierStrip whitespace from JSON to reduce payload size.XML FormatterPretty-print minified or messy XML with proper indentation.XML ValidatorCheck whether an XML document is well-formed.