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Reddit r/MachineLearningSeptember 19, 2026

OpenTrainDNN: An interactive, zero-dependency browser tool for visualizing backpropagation in neural networks. [P]

Excerpt

Hi r/MachineLearning , I built OpenTrainDNN , a browser-based tool designed to visually show how backpropagation and neural network training actually work step-by-step. Why I built it While there are theoretical guides on backpropagation, it can be hard to build an intuitive mental model without seeing weight updates, activations, and gradients evolve visually in real-time. I wanted a zero-setup, lightweight tool to experiment with these mechanics instantly. Key Features Zero Dependencies / No I