Tensor Spy: inspect NumPy and PyTorch tensors in the browser, no upload
We needed a side project to give agentic coding a try, and created tensorspy.com together with Junie and ChatGPT 5.2. Tensor Spy lets you quickly inspect the contents of numpy & pytorch tensors locally (your tensors are not uploaded to any servers). This is useful to validate your deep learning data pipelines, to check which layers in your diverging model are actually going haywire, and just because it's kind of cool & a lot more convenient for one-off inspections than loading things up in python. If you work with diffusion models, inspecting the latent space can be quite informative: you…
Tensor Spy: inspect NumPy and PyTorch tensors in the browser, no upload launched on March 2, 2026 with 22 votes, #847 of 23,380 launches that month and more than 90% of that year's launches.
In plain words
Tensor Spy is a browser-based tool for inspecting NumPy and PyTorch tensors without uploading data to servers. It helps deep learning developers validate data pipelines, debug diverging models, and visualize tensor contents including diffusion model latent spaces. The tool automatically computes basic statistics and flags infinite or NaN values, offering a more convenient alternative to manual Python inspections for quick tensor analysis.
written from the facts on this page · September 2026
From the sources
Tensor Inspection Multi-Tool — numpy, pytorch — your tensors never leave your browser — 100% free
Inspect and visualize local .npy, .npz, .pt, and .pth tensors directly in your browser. Slice, tile, reshape, compare, and hover-inspect values with local stats and keyboard control. Load NumPy and PyTorch tensor files and review shapes, dtypes, storage order, and metadata at a glance. Visualize tensors to confirm patterns, and hover to inspect exact values and indices. Hover stats include min/max, mean ± std, and counts of zeros, NaNs, and ±Infs. Choose x/y axes, tile extra dimensions, and flip channels-first/last layouts when auto-detection is wrong. Configure which dimensions are sliced by index versus tiled, and reshape into new tensors. NaN and Inf values render in high-contrast colors…from tensorspy.com
In the maker’s words, at launch
We needed a side project to give agentic coding a try, and created tensorspy.com together with Junie and ChatGPT 5.2. Tensor Spy lets you quickly inspect the contents of numpy & pytorch tensors locally (your tensors are not uploaded to any servers). This is useful to validate your deep learning data pipelines, to…
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