@cjtype @pixelambacht There is a little more activity.

1. This demo:
https://garretrieger.github.io/ift-demo/

2. The full source for the demo, including the client-side and server-side parts:
https://github.com/garretrieger/ift-demo

3. An IFT encoder, work in progress
https://github.com/w3c/ift-encoder

4. Recently we heard that a Japanese foundry, Studio株式会社 was working on an encoder and decoder (not released yet, but good news)
https://www.w3.org/2025/11/10-webfonts-minutes.html
https://studio.inc/

#webfonts #IncrementalFontTransfer