NumPy for Browser, Node.js, Deno and Bun

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I've been spending some time on a side project, `numpy-ts`, which is a TypeScript numerical library inspired by NumPy. It aims to bring the same NumPy API (where possible) to Node.js/Browser/Deno/Bun with full .npy/.npz compatibility (read & write). It currently has 476 of NumPy's 507 functions implemented, all cross-validated against NumPy with >6,000 validation tests. The lib is about 93 kB minified+gzipped and has zero dependencies, and it's fully tree-shakeable. Since it's written in TypeScript, it's on average 15x slower than NumPy. I just tagged 1.0.0, and will begin performance optimization soon (both algorithmic and selective WASM for fused kernels). You can try it in your browser here: https://numpyts.dev/playground Disclaimer that this was a mix of hand-written code (API, deterministic tooling) and AI-assisted (functional implementations, validation test implementations).

Visit product View on Hacker NewsFeb 25, 2026

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47%47% predicted probability of success on Hacker News, based on ML models trained on real launch data.

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38%38% predicted probability of success on AppSumo, based on ML models trained on real launch data.

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Acquire.comPre-revenue stage for this audience · Missing: arr, mrr, revenue

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3%3% predicted probability of success on BetaList, based on ML models trained on real launch data.

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