I have read and used the instruction given here to extract the individual glyphs of a font into separate svg files, but the files' names are not their unicode UTF-8 codes. The number of Glyphs is large and it would be difficult to rename them all by hand accordingly. Is there a way FontForge (or a similar free application online or on linux) can do this?
Simply write "%u.svg", instead of "svg".
See the documentation here.