JSON Formatter & Validator

Format, minify, sort, and repair JSON in real time. Automatically detects syntax errors with line numbers and cleans trailing commas locally.

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Samples:

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<div style="font-size:12px;color:#78716c;margin-top:6px;font-family:sans-serif;">Powered by <a href="https://lucentool.com/json-formatter" target="_blank" style="color:#c85a32;text-decoration:none;">Lucentool - JSON Formatter & Validator</a></div>

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<iframe src="https://lucentool.com/json-formatter" width="100%" height="650" style="border:1px solid #e5e0d8;border-radius:12px;max-width:850px;width:100%;" frameborder="0"></iframe>
<div style="font-size:12px;color:#78716c;margin-top:6px;font-family:sans-serif;">Powered by <a href="https://lucentool.com/json-formatter" target="_blank" style="color:#c85a32;text-decoration:none;">Lucentool - JSON Formatter & Validator</a></div>

Common JSON Syntax Rules & Error Recovery

JSON is a strict data interchange format. Unlike standard JavaScript object literals, RFC 8259 imposes rigid syntactic rules:

不允许末尾多余逗号 (Trailing Commas)：Trailing commas in arrays or objects break strict RFC parsers. The auto-fix engine cleans them automatically.
键名与字符串必须使用双引号：Keys and string values must strictly use double quotes, not single quotes or unquoted identifiers.
支持一键按字母顺序重排键名：Alphabetical key sorting normalizes objects across API responses for cleaner Git diff comparisons.

JSON Formatter & Validator

Common JSON Syntax Rules & Error Recovery

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