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JSON5 Validator

JSON5 Validator

Validate JSON5 and re-emit it as pretty JSON

JSON5 Input

About

Validate JSON5 documents (JSON with comments, trailing commas, unquoted keys and single-quoted strings) and re-emit them as pretty-printed JSON. Useful for config files (tsconfig, eslint) and modern JSON5 configs. Runs in your browser.

    Related guides

    JSON5 Explained: Comments, Trailing Commas, and Modern Syntax

    Learn what JSON5 adds to standard JSON—comments, unquoted keys, single quotes, trailing commas—and how to validate JSON5.

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