anyOf JSON Schema Keyword JSON Schema

Composition

Schema template

JSON Schema

{
  "anyOf": [
    {
      "type": "string"
    },
    {
      "type": "number"
    }
  ]
}

Valid example JSON

"abc"

Invalid example JSON

false

Fields

Field	Type	Required	Description
`anyOf`	schema[]	Yes	Validation passes when at least one schema matches. More than one match is allowed.

How to use this schema

Use anyOf for flexible inputs such as string-or-number IDs, alternative payload shapes, and backward-compatible API transitions.

Version support and combinations

This keyword or pattern is commonly supported across modern JSON Schema workflows. Check your validator for Draft-04, Draft-07, 2019-09, and 2020-12 behavior before relying on newer composition or conditional features.

Common combination: pair this reference with type, required, and properties so validation errors are specific enough for API clients and form users.

Batch validation seed

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anyOf JSON Schema Keyword