[nathcd]

The text format (.wast/.wat) should be derivable from the source (though I've no idea how to do this). From [1]:

> The design goals for a WebAssembly text format derive from the following use cases:

> View Source on a WebAssembly module, thus fitting into the Web (where every source can be viewed) in a natural way.

[1] http://webassembly.org/docs/text-format/

EDIT: looks like this [2] can convert between binary and textual format.

[2] https://github.com/WebAssembly/spec/tree/master/interpreter/