Eli Bendersky • 4/23/2026

Debugging WASM in Chrome DevTools

This article provides a practical guide to debugging WebAssembly (WASM) code in Chrome DevTools, using a Scheme compiler backend as an example. It covers setting up a local HTTP server, loading WASM modules, using breakpoints, stepping through code, inspecting local values and call stacks, and debugging unexpected exceptions with 'Pause on exceptions' feature. The author demonstrates with a sample project that constructs and prints Scheme-like s-expressions using WASM GC references.

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#debugging #Webassembly #Chrome Devtools