wasm-opt

Optimize WebAssembly binary files. More information: https://github.com/webassembly/binaryen.

• Apply default optimizations and write to a given file:

wasm-opt -O input.wasm -o output.wasm

• Apply all optimizations and write to a given file (takes more time, but generates optimal code):

wasm-opt -O4 input.wasm -o output.wasm

• Optimize a file for size:

wasm-opt -Oz input.wasm -o output.wasm

• Print the textual representation of the binary to console:

wasm-opt input.wasm --print