I recently saw itk-vtk-viewer
ITK/VTK Image Viewer is a Web based viewer for loading 2D/3D images and more…
Looks like there has been activity in writing VTK files with Julia, but it stalled a year ago. Is the philosophy that native Julia tools are or will be developed for web front ends?
I must say that this example looks pretty slick:
https://kitware.github.io/itk-vtk-viewer/app/?fileToLoad=https://data.kitware.com/api/v1/file/5ba9b49b8d777f06b9042e95/download/data.nrrd
View in a recent Firefox, Chrome or Safari browser.