Not sure if this changed since you asked, but the docs currently say they apply gzip compression to wasm and pck:
In order to reduce bandwidth and decrease loading times, itch.io’s CDN will automatically apply GZIP compression to the following file types if they are provided uncompressed.
File extensions:
- wasm
- pck
- …
But that’s not Brotli, so maybe you already knew that.
Those docs are where it says .br
files are detected as brotli. From this comment it sounds like you need the Godot export template to request files with the .br
extension (so the bootstrap js should try to load index.pck.br
). Not sure how to do that.
There’s an open issue on Godot for compressing the pck with Brotli: https://github.com/godotengine/godot/issues/20996