Unity personal edition lacks efficient splash screen tools and the ones available produce a poor result hardly better than the boring grey entry most seen in WebGL builds. Fortunately we can open the webGL build folder, tweak it and make better entry to our creations.
In a tiny "one page tutorial" we explain the creation of the splash screen in the editor and how to enhance it tweaking 3 images of the build folder.
Fig: Enhanced splash screen in WebGL build
The made by Unity message is still there but significantly less impactful.
The tutorial is available in our Unity3D tutorials public drive (look inside for "TutorialsInAPage" folder):
Defy: Using the tutorial info, create your own splash screens and answer to this post with images and links to your creations