/ tools · JSON Formatter
JSON Formatter & Validator
Paste raw JSON. Get it back pretty-printed, minified, or sorted. Syntax errors are pinpointed at the line and column, not just thrown back at you as Unexpected token.
Options
Input
Output
Input size
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Output size
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Delta
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Depth
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Total keys
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Root type
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Why a JSON Formatter?
API responses arrive minified, log files arrive as one giant line, and config files arrive with whatever quirky indentation the previous engineer favoured. This tool gives you a single canonical shape — and if your JSON is broken, it points at the exact character that broke it.
Nothing leaves your browser. The textarea content is parsed by JSON.parse, re-emitted by JSON.stringify, and shown back. No upload step, no API call.