Handwired
Turn your regular JavaScript code into a neural net. No training, exact yet also fully differentiable, runnable in a browser without GPU.
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What is Handwired?
Handwired is Turn your regular JavaScript code into a neural net. No training, exact yet also fully differentiable, runnable in a browser without GPU. It's designed for ml-curious programmers interested in how programs map onto neural network weights.
About Handwired
Key Strengths
- Compiles ordinary JavaScript into a ReLU and matrix-multiply neural net with no training, runnable in JS or on WebGPU
- Fun, concrete demos: a mini OS in 9,909 weights and JSON search over 100k documents
- MIT-licensed by Cheng Lou (about 1,960 GitHub stars), easy to run locally with Bun
Limitations to Consider
- A research experiment, not a production tool
- Exact only on integers and grids; FP32 limits break results past about 2^24
- Not an AI assistant or model you can prompt, so most directory visitors won't have a use for it
Best For
ML-curious programmers interested in how programs map onto neural network weights.
Skip it if: You're looking for an AI tool that helps you write or run code day to day.
Pricing
flexible pricing options
Free and open source (MIT). (checked Oct 23, 2026)
Sources
- https://chenglou.me/handwired/
- https://github.com/chenglou/handwired
- https://news.ycombinator.com/item?id=50105849
Pros, cons and pricing compiled from public sources (official pricing/docs pages, published reviews, user reports), not hands-on testing.
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What is Handwired?
Handwired is Turn your regular JavaScript code into a neural net. No training, exact yet also fully differentiable, runnable in a browser without GPU. It's designed for ml-curious programmers interested in how programs map onto neural network weights.
How much does Handwired cost?
Handwired offers flexible pricing options You can check pricing on their official website.
Who should use Handwired?
Handwired is best suited to ml-curious programmers interested in how programs map onto neural network weights.