Javascript utility to rotate image.

rotate-image.js

function rotateImage(path, degrees, callback) {
    var canvas = document.createElement('canvas'),
        ctx = canvas.getContext('2d'),
        image = new Image();

    image.src = path;
    image.onload = function () {
        canvas.width = image.height;
        canvas.height = image.width;
        ctx.translate(image.width/2, image.width/2);
        ctx.rotate(degrees * Math.PI / 180);
        ctx.translate(-image.width/2, -image.width/2);
        ctx.drawImage(image, 0, 0); 

        callback(canvas.toDataURL());
    };
}