HDMI Specification Version 2.1 was released on November 28, 2017, superseding Version 2.0. In order to obtain the HDMI 2.1 specification, you must be a current adopter. Current adopters must sign an addendum to their adopter agreement. Once this addendum has been executed, adopters are able to download the 2.1 specification on the Adopter Extranet.

HDMI Specification Ver.1.4b and the Compliance Test Specification Ver.1.4b (CTS 1.4b), released on October 11, 2011, are available for download only by Licensed HDMI Adopters.

However, the updated 3D portion of the HDMI Specification Version 1.4a is available for public download.

Download the 3D portion of the HDMI Specification Version 1.4a »

Export Control Warning
NOTE: By downloading HDMI specification and technical information, you agree to comply with all export control regulations and to obtain any required authorizations to export, re-export or import HDMI software or technical information. You agree to not export or re-export software or technical information to embargoed or otherwise restricted countries, end-users, or end-uses. You agree to not use HDMI products or technical information for prohibited nuclear, missile, or chemical biological weaponry end uses. For further information, please consult the Bureau of Industry and Security (www.bis.doc.gov)

For those who wish to download the HDMI Specification Ver.1.3a, please click here.