Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time

NOTE: this is a WIP, and I have not had time to maintain it for some-time; it can currently transpile basic constructs, but that is just about that. Please check back in a year or so; thanks a lot!

Jazzle -- Dazzlingly Fast ECMAScript Transpiler


Jazzle is a dazzingly fast, new transpiler for ECMAScript, making new features like destructuring (complex) assignments, classes, lexical variables, arrow functions, and template strings available in environments where they are not yet supported.

It uses a number of novel techniques to efficiently implement features not (efficiently, if at all) implemented in other transpilers, most notably temporal dead zones for lexical variables and super-bound this references.

Oh, and it is still about 2x as fast as babel on early benchmarks.

Give it a try and you will be surprised!



npm install -g jazzle # you might need to be root (sudo) to use the -g flag


var src = 'let [myCoolSource] = a => 12;',
    jazzle = require('jazzle');

var result = jazzle.transform(src, {sourceType: 'module'});

var fs = require('fs');

fs.writeFileSync('output.js', result.code);
fs.writeFileSync('output.js.sourcemap', result.sourceMap);

CLI is currently in the making, and will be up and running early next week; stay tuned!