CosmWasm Schema Validator

Draft-07 core coverage: type , required , properties , additionalProperties , items , enum , minimum , maximum , minLength , maxLength , and pattern .
oneOf / anyOf: CosmWasm message enums rely on oneOf — the validator reports which branches matched and why the rest failed.
$ref resolution: internal #/definitions/&lt;Name&gt; references are followed so reusable types (e.g. Addr , Uint128 ) validate correctly.
JSON Pointer paths: every error carries a /a/b/c path and the failing keyword, making it easy to fix the payload line.
Bundled presets: cw20 Transfer, cw721 Mint, and a cw20 Balance query load a working schema + payload in one click.
Client-side only: contract schemas and payloads stay in the tab. Nothing is uploaded.

Validate a CosmWasm contract schema (ExecuteMsg, QueryMsg) against sample JSON payloads with detailed error reports.

Presets

JSON Schema

Sample Payload

Validate a CosmWasm contract schema (ExecuteMsg, QueryMsg) against sample JSON payloads with detailed error reports.

Presets

JSON Schema

Sample Payload