Clone this repo:
  1. b9cddea Miscellanous floating-point and unicode tests (#807) by Dan Gohman · 5 days ago master
  2. c8338e9 [test] Add test to cover one checkpoint in (#834) by Wanming Lin · 6 days ago
  3. c8355fb [test] Remove tested checkpoints in (#833) by Wanming Lin · 8 days ago
  4. 0a8f46f [test] Add more type mismatch tests for block construct (#835) by Wanming Lin · 8 days ago
  5. 2113ea7 [test] Remove non-conformance checkponits (#812) by Wanming Lin · 13 days ago

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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.