title: Why are my PNG images bigger in filesize than the source after upload to magento?
body: <p>I recently discovered iloveimg.com as a way to genuinely compress my png images before I upload them to my store. However, I have problems uploading the png image as-is:</p>
  
  <p>For example I uploaded <a href="https://ibb.co/bx4vJk" rel="nofollow noreferrer">this file which has 17.125 Bytes</a> to a CMS Page via the insert image feature. After the successful upload, <a href="https://ibb.co/iQN4B5" rel="nofollow noreferrer">this file on the server has now 32.287 Bytes</a>. At this point I did not even insert the image to the page, I just uploaded it. To my surprise it almost doubled the filesize. I linked to each file so maybe this helps identifying the issue.</p>
  
  <p>Can anyone explain why this does happen? I suppose it has something to do with the Gd2.php file which unfortunately I cannot fully understand nur handle. I am using magento 1.9.3.4.</p>