• Host: iiif.wellcomecollection.org
  • Protocols: https

Access to image-based resources is fundamental to research, scholarship and the transmission of cultural knowledge. The International Image Interoperability Framework (IIIF) is a set of APIs for interoperable functionality in digital image repositories.

Using JSON-LD, linked data, and standard W3C web protocols such as Web Annotation, IIIF makes it easy to parse and share digital image data, providing a rich set of functionality for viewing, comparing, manipulating and annotating images.

IIIF is created by a growing community of the world’s leading research libraries and image repositories with the following goals:

  • To give scholars an unprecedented level of uniform and rich access to image-based resources hosted around the world.
  • To define a set of common application programming interfaces that support interoperability between image repositories.
  • To develop, cultivate and document shared technologies, such as image servers and web clients, that provide a world-class user experience in viewing, comparing, manipulating and annotating images.

There are four IIIF specifications:

  • Image API
  • Presentation API
  • Content Search API
  • Authentication API

We currently support the Image API.

Image API

The IIIF Image API specifies a web service that returns an image in response to a standard HTTP or HTTPS request. The URI can specify the region, size, rotation, quality characteristics and format of the requested image.

A URI can also be constructed to request basic technical information about the image to support client applications. This API was conceived of to facilitate systematic reuse of image resources in digital image repositories maintained by cultural heritage organizations.