OpenType specification

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

OpenType specification version 1.5

Appendices

Updates to this specification are noted in the change log and have been submitted for inclusion in ISO/IEC 14496-22, the "Open Font Format". These changes are reflected in the Committee Draft of the second edition of the ISO/IEC 14496-22.

Other versions of the OpenType specification are posted here.