You can use the SPIR-V compiler toolchain to just transpile from GLSL to WGSL :)

Minor nitpick: this translation happens in separate libraries/tools which just make use of the SPIRVTools library for some SPIRV processing tasks, but not the actual translation to WGSL.

Tint (Google, implemented in C++): https://dawn.googlesource.com/tint/

Naga (Mozilla(?), implemented mostly in Rust): https://github.com/gfx-rs/naga

Both are a bit similar to SPIRV-Cross, except that they also support WGSL.

Naga (a community project) translates GLSL directly into WGSL, unlike other tools.

Ah alright, thanks for the correction :)

Yes I know, even more fun dealing with additional kludges, because 3D on the Web versus native doesn't have enough of them already.