JSZip

A library for creating, reading and editing .zip files with Javascript, with a lovely and simple API.

See http://stuartk.com/jszip for all the documentation

var zip = new JSZip();

zip.file("Hello.txt", "Hello World\n");

var img = zip.folder("images");
img.file("smile.gif", imgData, {base64: true});

var content = zip.generate();

location.href = "data:application/zip;base64," + content;
/*
Results in a zip containing
Hello.txt
images/
    smile.gif
*/