JSON Validator
Validate JSON syntax accuracy with precise line and column error indicators, structural sanity checks, and automated formatting suggestions.
⚡Related Developer Tools
Frequently used together with JSON Validator
JSON Formatter & Beautifier
Format, beautify, and validate raw JSON with customizable indentation, collapsible tree view, inline line-number error highlights, and minification.
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Explore large JSON files using an interactive, searchable tree view with node expansion, key filtering, data type indicators, and single-click node copying.
SQL Formatter & Beautifier
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Preguntas Frecuentes
What makes JSON invalid?
Invalid JSON includes: trailing commas after the last item, single quotes instead of double quotes, unquoted property keys, undefined or NaN values, comments, and improperly escaped characters.
What is the difference between JSON and JSON5?
JSON5 is an extension of JSON that allows comments, trailing commas, single quotes, and unquoted keys. However, standard JSON (RFC 8259) does not support these features. Most APIs and parsers expect standard JSON.
Can I validate JSON Schema compliance?
This tool validates JSON syntax (RFC 8259 compliance). For JSON Schema validation — checking that a JSON document matches a specific schema definition — use the dedicated JSON Schema Validator tool.