wabt-bin 2.1.0

WebAssembly Binary Toolkit — native CLI tools

WABT: The WebAssembly Binary Toolkit

A fork of WebAssembly/wabt ported from C++ to Zig and maintained with AI assistance.

100% WebAssembly 3.0 spec conformance — 65,011/65,011 tests passing.

Install

Pre-built binaries are published to GitHub Releases and PyPI. See installation details.

$ dist install cataggar/wabt

$ uv tool install wabt-bin

Tools

• wat2wasm: translate from WebAssembly text format to the WebAssembly binary format
• wasm2wat: the inverse of wat2wasm, translate from the binary format back to the text format (also known as a .wat)
• wasm-objdump: print information about a wasm binary. Similar to objdump.
• wasm-interp: decode and run a WebAssembly binary file using a stack-based interpreter
• wasm-decompile: decompile a wasm binary into readable C-like syntax
• wat-desugar: parse .wat text form and print canonical flat format
• wasm-strip: remove sections of a WebAssembly binary file
• wasm-validate: validate a file in the WebAssembly binary format
• wast2json: convert a file in the wasm spec test format to a JSON file and associated wasm binary files
• wasm-stats: output stats for a module

Building

Requires Zig 0.15.x. No other dependencies.

$ git clone --recursive https://github.com/cataggar/wabt
$ cd wabt
$ zig build

For release builds:

$ zig build -Doptimize=ReleaseSafe

Cross-compilation works out of the box:

$ zig build -Dtarget=aarch64-linux -Doptimize=ReleaseSafe
$ zig build -Dtarget=aarch64-macos -Doptimize=ReleaseSafe
$ zig build -Dtarget=x86_64-windows -Doptimize=ReleaseSafe

Running tests

Unit tests:

$ zig build test

Wasm 3.0 spec tests:

$ zig build -Doptimize=ReleaseSafe
$ ./zig-out/bin/spectest-interp third_party/testsuite/i32.wast

Wasm 3.0 proposals

All ratified Wasm 3.0 proposals are enabled by default:

Proposal	Status
Exception handling	✓
GC (garbage collection)	✓
Memory64	✓
Multi-memory	✓
Tail calls	✓
Relaxed SIMD	✓
Extended const	✓
SIMD	✓
Bulk memory	✓
Reference types	✓
Multi-value	✓
Annotations	✓

License

Apache 2.0