Clone this repo:
  1. b568df7 [test] More inconsistent lengths (#1029) by Wanming Lin · 7 days ago master
  2. 8c8f5f1 [interpreter] Fix broken link (#1035) by Rikard Hjort · 7 days ago
  3. 7940fa4 [test] Fix unintended errors in negative tests (#1034) by Erik McClure · 3 weeks ago
  4. 41747be Remove extraneous copyright from bikeshed document (#1030) by Ben Smith · 4 weeks ago wg_v1
  5. 4bf74f6 [test/interpreter] Rounding edge cases for float literals (#1025) by Andreas Rossberg · 4 weeks ago

Build Status


This repository holds the sources for the WebAssembly draft specification (to seed a future WebAssembly Working Group), a reference implementation, and the official testsuite.

A formatted version of the spec is available here:,

Participation is welcome. Discussions about new features, significant semantic changes, or any specification change likely to generate substantial discussion should take place in the WebAssembly design repository first, so that this spec repository can remain focused. And please follow the guidelines for contributing.