ONNX INFERENCE, FROM SCRATCH

Fraud checks that run in the browser.

Crucible is a hand-written ONNX inference engine: a C++17 core (20 operators, runs ResNet18 and MobileNetV2) behind a FastAPI server, plus a small separate Rust runtime compiled to WebAssembly that scores this fraud model inside your tab.

Run fraud check Open model playground

this tab · crucible-wasm

● running

Scored just now in your browser — values below are live, not recorded.

loading model + runtime…

ONNX ops · native C++

ONNX ops · WASM runtime

parity cases vs ONNX Runtime

0 bytes

sent during WASM scoring

Fraud Demo

Try Indian transaction examples and run a fraud check fully inside the browser.

Run fraud check →

Playground

Inspect model inputs, graph steps, and browser-side execution behaviour.

Inspect model →

Benchmark

Measured latency against ONNX Runtime and PyTorch — including where Crucible is slower.

View results →

Built so the data stays where it starts.

Crucible ships the model as static bytes and evaluates it locally in the browser sandbox. Only the score is returned to the app. Raw transaction features do not leave the device.

Local WebAssembly execution

Kernels run inside the browser's WASM sandbox.

No inference network hop

Zero bytes are transmitted for scoring.

Inspectable ONNX graph

Every node and shape is visible in the Playground.