The WebAssembly Component Model is a broad-reaching architecture for building interoperable Wasm libraries, applications, and environments.

Understanding componentsBuilding componentsUsing components
Why Components?JavascriptComposing

ⓘ This documentation is aimed at users of the component model: developers of libraries and applications. Compiler and Wasm runtime developers can take a look at the Component Model specification to see how to add support for the component model to their project.


The component model is a work in progress. Although the architecture is well-defined, details are still evolving. This version of the guide is current as of late August 2023.


If you find a mistake, omission, ambiguity, or other problem, please let us know via GitHub issues.

If you'd like to contribute content to the guide, please see the contribution guide for information on how to contribute.