Script to scale up Illustrator Assets, in a single document.

Illustrator_Scale_Artboard_and_Artwork.jsx

#target Illustrator
 
requiredABsize = prompt( 'Scale artboards to what square size?\nRemember this number to create enough space between your scaled artboards in the next step.\n\nThis script uses \"Scale Strokes and Effects\" for you.\n\n', '500', 'Select artboard area');

// Make sure the user generates enough space between the artboards
app.executeMenuCommand("ReArrange Artboards");

var activeDoc = app.activeDocument;
var TotalArtboards = activeDoc.artboards.length;  
var originalOrigin = activeDoc.rulerOrigin;

for (var i = 0 ; i < TotalArtboards; i++){
    var _artboards = activeDoc.artboards;
    var abActive   = _artboards[i];
    var abProps    = getArtboardBounds(abActive);
    var scale      = findRequiredScale(abProps);
		// abActive   = activeDoc.artboards[ activeDoc.artboards.getActiveArtboardIndex() ];
    activeDoc.artboards.setActiveArtboardIndex(i);
		// alert(i);
    app.selection = [];
    // app.executeMenuCommand ('deselectall');
    app.executeMenuCommand ('selectallinartboard');
    var selection = activeDoc.selection;

    var artboardRight = abActive.artboardRect[2];
    // Get the Height of the Artboard
    var artboardBottom = abActive.artboardRect[3];
    var artboardX = abActive.artboardRect[0];
    var artboardY = abActive.artboardRect[1];
		
		var horziontalCenterPosition = (artboardRight+(-1*artboardX))/2;
		var verticalCenterPosition = (artboardY-(artboardBottom))/2;
		//alert(app.activeDocument.rulerOrigin+"\n left "+artboardX+"\ntop "+artboardY+"\nright "+artboardRight+"\nbottom "+artboardBottom+"\nTheleft: "+horziontalCenterPosition+"\nThevert: "+verticalCenterPosition);

		activeDoc.rulerOrigin = [horziontalCenterPosition,verticalCenterPosition];
 
	app.selection = [];
	activeDoc.selectObjectsOnActiveArtboard();
	// app.executeMenuCommand ('selectallinartboard');

    // Check if anything is selected:
    if (selection.length > 0) 
    {
        for (j = 0; j < selection.length; j++) 
        {
            selection[j].resize (scale*100, scale*100, true, true, true, true, scale*100, Transformation.DOCUMENTORIGIN);
        }
    }

		var scaledArtboardRect = newRect(-abProps.width/2  * scale, -abProps.height/2  * scale, abProps.width * scale,abProps.height * scale);
		activeDoc.artboards[i].artboardRect = scaledArtboardRect;    
}
activeDoc.rulerOrigin = originalOrigin;

// Artboard bounds helper (used above):
function getArtboardBounds(artboard) {
 
  var bounds = artboard.artboardRect,
 
      left   = bounds[0],
      top    = bounds[1],
      right  = bounds[2],
      bottom = bounds[3],
 
      width  = right - left,
      height = top - bottom,
 
      props  = {
        left   : left,
        top    : top,
        width  : width,
        height : height
      };
 
  return props;
}
 
function findRequiredScale(props) {
    var scale = Math.min(requiredABsize / props.height, requiredABsize / props.width);
    if (scale >1)
    return scale;
    else
    return 1;
}

function newRect(x, y, width, height) 
{
    var l = 0;
    var t = 1;
    var r = 2;
    var b = 3;
 
    var rect = [];
 
    rect[l] = x;
    rect[t] = -y;
    rect[r] = width + x;
    rect[b] = -(height - rect[t]);
 
    return rect;
};