When given a WebAssembly file, this site will try to shrink it down to a smaller size. It will report whether it succeeded, and if so, will let you download that optimized binary.
This runs Binaryen's wasm-opt tool. wasm-opt has many optimizations that can improve WebAssembly files' size and speed.
Note that there is no server component! Everything here runs on the client, right here on the page.
This may be slower than running wasm-opt locally for a few reasons: