Image Schema · Unhead

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- Composables
  - [`useSchemaOrg()`](https://unhead.unjs.io/docs/typescript/schema-org/api/composables/use-schema-org)
- Nodes
  - [Article](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/article)
  - [Book Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/book)
  - [Breadcrumb Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/breadcrumb)
  - [Comment Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/comment)
  - [Course Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/course)
  - [Dataset Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/dataset)
  - [Event Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/event)
  - [Food Establishment Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/food-establishment)
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  - [Music Group Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/music-group)
  - [Music Playlist Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/music-playlist)
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  - [SoftwareApplication](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/software-app)
  - [TV Episode Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/tv-episode)
  - [TV Season Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/tv-season)
  - [TV Series Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/tv-series)
  - [Video Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/video)
  - [WebPage Schema](https://unhead.unjs.io/docs/typescript/schema-org/api/schema/webpage)
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Schema

# Image Schema

[Copy for LLMs](https://raw.githubusercontent.com/unjs/unhead/refs/heads/main/docs/schema-org/5.api/9.schema/image.md)

Last updated Jan 19, 2026 by [Harlan Wilton](https://github.com/harlan-zw) in [docs: sync](https://github.com/unjs/unhead/commit/d2f86454774aa60706628b46a850653e1e4d56d9).

On this page

- [Schema.org Image](#schemaorg-image)
- [Useful Links](#useful-links)
- [Required properties](#required-properties)
- [Defaults](#defaults)
- [Resolves](#resolves)
- [Examples](#examples)
- [Types](#types)

## [Schema.org Image](#schemaorg-image)

- **Type**: `defineImage(input?: Image)`

Describes an individual image (usually in the context of an embedded media object).

## [Useful Links](#useful-links)

- [ImageObject - Schema.org](https://schema.org/ImageObject)
- [Image - Yoast](https://developer.yoast.com/features/schema/pieces/image)

## [Required properties](#required-properties)

- **url** `string`The URL of the image file (e.g., /images/cat.jpg).

## [Defaults](#defaults)

- **@type**: `ImageObject`
- **@id**: `${canonicalUrl}#/schema/image/${hash(image.url)}`
- **inLanguage**: `options.defaultLanguage` (only when caption is provided) _(see: [user Config](https://unhead.unjs.io/docs/schema-org/guides/core-concepts/params))_
- **contentUrl**: is set to `url`

## [Resolves](#resolves)

See [Global Resolves](https://unhead.unjs.io/docs/schema-org/guides/get-started/overview#site-page-level-config) for full context.

- `width` and `height` must be provided for either to be included

## [Examples](#examples)

### [Minimal](#minimal)

```
defineImage({
  url: '/cat.jpg',
})
```

## [Types](#types)

```
export interface ImageSimple extends Thing {
  /**
   * The URL of the image file (e.g., /images/cat.jpg).
   */
  url: string
  /**
   * The fully-qualified, absolute URL of the image file (e.g., https://www.example.com/images/cat.jpg).
   * Note: The contentUrl and url properties are intentionally duplicated.
   */
  contentUrl?: string
  /**
   * A text string describing the image.
   * - Fall back to the image alt attribute if no specific caption field exists or is defined.
   */
  caption?: string
  /**
   * The height of the image in pixels.
   * - Must be used with width.
   */
  height?: number
  /**
   * The width of the image in pixels.
   * - Must be used with height.
   */
  width?: number
  /**
   * The language code for the textual content; e.g., en-GB.
   * - Only needed when providing a caption.
   */
  inLanguage?: string
  /**
   * The name of the image.
   */
  name?: string
  /**
   * A description of the image.
   */
  description?: string
  /**
   * The file format or media type of the image (e.g., image/jpeg).
   */
  encodingFormat?: string
}
```

[Edit this page](https://github.com/unjs/unhead/edit/main/docs/schema-org/5.api/9.schema/image.md)

[Markdown For LLMs](https://raw.githubusercontent.com/unjs/unhead/refs/heads/main/docs/schema-org/5.api/9.schema/image.md)

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On this page

- [Schema.org Image](#schemaorg-image)
- [Useful Links](#useful-links)
- [Required properties](#required-properties)
- [Defaults](#defaults)
- [Resolves](#resolves)
- [Examples](#examples)
- [Types](#types)

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### Schema.org

- [Getting Started](https://unhead.unjs.io/docs/typescript/schema-org/guides/get-started/overview)
- [useSchemaOrg](https://unhead.unjs.io/docs/typescript/schema-org/api/composables/use-schema-org)
- [Nodes](https://unhead.unjs.io/docs/typescript/schema-org/guides/core-concepts/nodes)
- [Recipes](https://unhead.unjs.io/docs/typescript/schema-org/guides/recipes/identity)

### Guides

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- [Plugins](https://unhead.unjs.io/docs/typescript/head/guides/plugins/template-params)

### Tools

- [Meta Tag Generator](https://unhead.unjs.io/tools/meta-tag-generator)
- [OG Image Generator](https://unhead.unjs.io/tools/og-image-generator)
- [Schema.org Generator](https://unhead.unjs.io/tools/schema-generator)
- [Capo.js Analyzer](https://unhead.unjs.io/tools/capo-analyzer)

### Articles

- [What is Capo.js?](https://unhead.unjs.io/learn/guides/what-is-capo)

### Research

- [State of <head> in 2026](https://unhead.unjs.io/learn/research/state-of-head-2026)
- [Streaming Head Performance](https://unhead.unjs.io/learn/research/streaming-head-performance)
- [Capo.js Performance Research](https://unhead.unjs.io/learn/research/capo-performance-research)

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