Move Sinhala between Unicode and legacy FM fonts, both ways

Across the world, Sinhala lives in two encodings. Modern websites, phones and software use Unicode, while a large body of printed material, page layouts and older documents was made with legacy FM fonts such as FM Abhaya. Anyone working between them — a designer preparing artwork, a publisher reusing an old file, or a member of the diaspora opening a document that arrived as gibberish — needs to convert one to the other.

This is a hands-on example of character encoding: the same letter can be stored under different code points, which is why text copied from an old document turns into nonsense until it is converted. The tool works both directions, has a bilingual English and Sinhala interface, and adds voice typing, read-aloud, copy, download and print.