Learn WAT with Real Code Examples

Build ultra-small libraries for performance-critical apps

Offer Wasm microservices

Educational material (courses, books)

Wasm debugging/optimization tools

Security auditing of Wasm binaries

Support for more Wasm instructions and proposals

Integration with Component Model

Better debugging tools

More learning resources

Improved binary optimization

Large-scale applications

Anything requiring high-level abstractions

UI-heavy web apps

Projects expecting fast development cycles

Situations requiring strong type systems

WAT is the human-readable text format for WebAssembly.

It offers full low-level control over functions, memory, and types.

Ideal for debugging, learning, and crafting minimal Wasm binaries.

Not suited for large applications but excellent for performance insights.

Essential tool for anyone working deeply with WebAssembly internals.

Is WAT mandatory for using WebAssembly?

No - it's optional, used for debugging and learning.

Is WAT slower than binary?

No - WAT is compiled to binary before execution.

Can you build entire apps in WAT?

Not practical - WAT is too low-level.

Does WAT support variables?

Local variables exist but operations still use stack.

Can WAT interact with JS?

Yes - via import/export declarations.