MedSAM  pure-C++ ViT-B encoder + SAM decoder (medical) → WebAssembly. Segment CT/MRI/etc. in-browser, no server.

A sample abdominal-CT slice is loaded by default (or pick your own image). 1) Encode (ViT-B runs once; heavy — ~1–2 min) → 2) click a point or drag a box over an organ/structure to segment it. Sample image from the MedSAM repo.