OpenType® Specification

The OpenType™ specification has been formatted in HTML, but may link to .PDF files.

OpenType specification version 1.8.4



OpenType 1.8.4 incorporates revisions in Amendment 1 of the 4th edition of the ISO/IEC 14496-22 “Open Font Format” standard. Current editions and amendments of ISO/IEC 14496-22 are freely available for download from the ISO website.

Updates to this specification are noted in the change log.