API Response Formatter
Prettifies JSON and API response data with configurable indentation, sorting, and syntax validation — fixes malformed JSON and makes nested structures readable.
How to Use the API Response Formatter
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Pretty-prints raw JSON with configurable indent width, key sorting, and bracket collapsing options while flagging syntax errors with exact.
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Frequently Asked Questions
How do I read deeply nested payloads?
Paste the response: objects indent per level with collapsible structure. A 200-line webhook body becomes navigable in one pass.
Does it fix malformed JSON?
It flags exact error positions (trailing commas, unquoted keys) and formats what's salvageable. Fix the flagged line, re-paste, re-format.
Can I sort keys?
Yes — alphabetical key sorting stabilizes diffs between API versions. Sorted responses compare cleanly in reviews.
Is response data uploaded?
No — formatting runs locally in your browser. Payloads never leave your device.
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Last updated October 2026