title: smallest filesize for transparent single pixel image
body: <p>I'm looking for the smallest (in terms of filesize) transparent 1 pixel image.</p>
  
  <p>Currently I have a gif of 49 bytes which seems to be the most popular.</p>
  
  <p>But I remember many years ago having one which was less than 40 bytes. Could have been 32 bytes.</p>
  
  <p>Can anyone do better? Graphics format is no concern as long as modern web browsers can display it and respect the transparency.</p>
  
  <p><strong>UPDATE</strong>: OK, I've found a 42 byte transparent single pixel gif:
  <a href="http://bignosebird.com/docs/h3.shtml" rel="noreferrer">http://bignosebird.com/docs/h3.shtml</a></p>
  
  <p><strong>UPDATE2</strong>: Looks like anything less than 43 bytes might be unstable in some clients. Can't be having that.</p>