Clone this repo:
  1. 9efed9e [spec] Support reading and writing empty table entries (#587) by Andreas Rossberg · 4 days ago master
  2. 0f96f03 [spec] Document `make publish` in README by Andreas Rossberg · 4 days ago
  3. d9cfaf2 Mention suggested MIME type in Binary Format | Conventions (#589) by Luke Wagner · 5 days ago
  4. db162d0 [interpreter] Add missing dependency to install target (#588) by Benjamin Beurdouche · 6 days ago v1.0
  5. 8fa1e6b [spec] Add note regarding authorative role of standard dependencies (#582) by Andreas Rossberg · 7 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.