title: measure distance in pixels on image
body: <p>I have an image that I want to convert to an HTML page.
  The image I have is a PNG that is 1:1 ratio.</p>
  
  <p>I want ,for example, to measure the width, height, padding of element on the image so that I can convert it to CSS.</p>
  
  <p>What's the easiest way to measure the distance in pixel between 2 points on the image?
  It would be best if I could avoid photoshop for this purpose.</p>