OpenType specification

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

OpenType specification version 1.7

Appendices

OpenType 1.70 is fully equivalent to the ISO/IEC 14496-22:2015 (3rd edition) “Open Font Format” standard. The standard will be published in June 2015 and at that time will be freely available for download from the ISO website.

Updates to this specification are noted in the change log.