verified openmods.json Validator

Check your manifest against the same parser OpenMods uses on every sync. Paste a single file for JSON syntax errors, missing fields, unknown properties and a preview of how it lands on your mod page — or scan a whole repository for the problems one file can't show you, like two manifests claiming the same slug.

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openmods.json

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Awaiting input

Click Validate to check your manifest. The validator runs the exact OpenModsManifest parser used during sync, plus extra checks for unknown top-level properties (catches typos like Name vs name).

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For live IDE validation

Add "$schema": "https://openmods.net/manifest.schema.json" to the top of your openmods.json. VS Code and most editors will then highlight errors, autocomplete fields, and show inline docs as you type — without needing to paste anything here.

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