Comment by darrenf

Or you use Google's own TTF <-> WOFF2 converter tools: https://github.com/google/woff2 [0]

I have very recent -- like, 2 weeks ago -- successful experience of using these, since I wanted to distribute a WOFF2 as part of a browser extension.

[0] edited to add - you don't have to build it, you can get it from homebrew https://formulae.brew.sh/formula/woff2 or an Arch package https://archlinux.org/packages/extra/x86_64/woff2/ and presumably other distros