The real visualizer, compiled from Rust to WebAssembly. It trains a 784·320·100·10 network on 10k MNIST digits in this tab (about 2 MB to load). Draw a digit in the right-hand pad to test it.
The full visualizer (live training, every neuron) is laid out for a desktop window. On a phone it fits best in landscape.
Turn your phone sideways: the visualizer is laid out for a wide screen.