Neural Networks Explained — Interactive Demos in the Browser

Complex AI concepts, explained clearly and simply. Interactive experiments, in-depth articles, and hands-on projects — explore how AI actually works, from the math up.

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Handwriting recognition demo

Handwriting Recognition in the Browser

A neural network that reads your handwriting — trained and running entirely in JavaScript, no server, no ML library. Draw a letter and watch it classify in real time.

Neural network knowledge visualization

Knowledge Extraction from a Neural Network

What does a network trained on MNIST actually learn? Two methods to find out: causal index heat maps and iterative input optimization — both running in pure JavaScript.