Clone this repo:
  1. 2285497 [test] Add tests for and fix alignment overflow (#1751) by Soni L · 2 weeks ago main master
  2. b4dd180 [test] Use `node` over `spidermonkey` by default (#1748) by Sam Clegg · 3 weeks ago
  3. 621d8c0 [test] Add `--failfast` flag to test runner (#1747) by Sam Clegg · 3 weeks ago
  4. 2428473 [spec] Check and fix cross-references (#1746) by Andreas Rossberg · 4 weeks ago
  5. beb8fb5 [test] Remove stray tabs from test files (#1745) by Sam Clegg · 4 weeks ago

CI for specs CI for interpreter & tests


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.


For citing WebAssembly in LaTeX, use this bibtex file.