Several years already I offer here on my site CyrAcademisator, a tool for scientific transliteration of Russian texts. Today I would like to announce the launch of the adapted version for Old Church Slavonic.
The new beta version converts Cyrillic texts in Old Church Slavonic language (prior 1700) into either scientific transliteration, romanisation according to Library of Congress or Russian Cyrillic (normalised, 1700-1918).
Other transliteration styles and advanced settings are under way.