WASM Compatibility Checker for marimo Notebooks

Check whether a marimo notebook can run in a WebAssembly (WASM) environment — the marimo playground, community cloud, or exported WASM HTML.

Instructions

1. Read the notebook

Read the target notebook file. If the user doesn't specify one, ask which notebook to check.

2. Run marimo's WASM lint rules

marimo ships three lint rules that catch most WASM incompatibilities automatically. Run them first, and build the report from their output instead of re-deriving these checks by hand:

marimo check <notebook> --select MW --format json