Config Structure Checker

Validate JSON or YAML config: syntax and optional required top-level keys. Paste config, list required keys (one per line), get errors.

JSONYAML

Config

Required keys (one per line, optional)

Click "Validate" to check your code

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About this tool

Checks that config is valid JSON or YAML and that all required top-level keys are present. Use for package.json, app config, CI configs. Leave "Required keys" empty to only validate syntax.