Draw a numeric digit or an alphabet in the box, and click the "Recognize" button. The neural network will try to guess what you drew. Click the "Clear" button to start over. Note that the following alphabets are merged since they look very similar: C/c, I/i, J/j, K/k, L/l, M/m, O/o, P/p, S/s, U/u, V/v, W/w, X/x, Y/y, Z/z.
I've achieved ≈87% accuracy on the EMNIST test dataset from TensorFlow Datasets. I've used TensorFlow to train the neural network, and TensorFlow Datasets to download the EMNIST dataset. Thanks to TensorFlow contributors.