TensorFlow Playground
A hands-on page where you train a small neural network right in the browser. Change the number of layers and neurons, the activation function, or the learning rate, and watch how the decision boundary shifts. There is no model to download, so it runs the moment you open it.
How to try it
Pick a data shape such as circle or spiral under 'Data' on the left, use the + and - buttons in the middle to add or remove hidden layers and neurons, then press play at the top to start training. The background color under 'Output' on the right is what the network predicts, and you can watch the test loss drop alongside it. The interface is English only and is laid out for wide screens, so a desktop browser is recommended.