dpschen

(function () {
	
    function loadZendeskChat(callback) {
      var zdscript = document.createElement('script');
      zdscript.setAttribute('id','ze-snippet');
      zdscript.src = 'https://static.zdassets.com/ekr/snippet.js?key=XXX-XXX-XXX-XXX';
      (document.getElementsByTagName('body')[0]).appendChild(zdscript);

      window.zdonload = setInterval(function(){
        if(typeof zE !== "undefined" && typeof zE.activate !== "undefined") {

dpschen

This can reduce files to ~15% of their size (2.3M to 345K, in one case) with no obvious degradation of quality.

ghostscript -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/printer -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Other options for PDFSETTINGS:

• /screen selects low-resolution output similar to the Acrobat Distiller "Screen Optimized" setting.
• /ebook selects medium-resolution output similar to the Acrobat Distiller "eBook" setting.
• /printer selects output similar to the Acrobat Distiller "Print Optimized" setting.
• /prepress selects output similar to Acrobat Distiller "Prepress Optimized" setting.

dpschen

/* ---------------------------------------------------------- */
/*                                                            */
/* A media query that captures:                               */
/*                                                            */
/* - Retina iOS devices                                       */
/* - Retina Macs running Safari                               */
/* - High DPI Windows PCs running IE 8 and above              */
/* - Low DPI Windows PCs running IE, zoomed in                */
/* - Low DPI Windows PCs and Macs running Firefox, zoomed in  */
/* - Android hdpi devices and above                           */