
weightslab
Hooks into a live PyTorch training loop to surface mislabels, outliers, and class imbalance without restarting.

WeightsLab is a free, open-source tool that hooks into a live PyTorch training loop, letting ML engineers pause training, sort samples by loss to find mislabels and outliers, relabel or drop them, and resume from the same checkpoint without restarting. It's built for messy real-world image, video, and LiDAR data, connecting training signals back to the exact samples causing them rather than just logging aggregate metrics like a typical experiment tracker. It's aimed at AI engineers who want to fix their data live during training instead of debugging it after the fact.
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