3 ms·

Also, FYI, most Unix-like systems have a correct 'magic' file so that running the command: file filename.jpg will say whether or not the image is progressive.

• billyhoffman 12y ago
  Patrick's tool is far more than an boolean "is this a progressive JPEG or not." Comparing it to the "file" utility is a gross underestimate. It takes a JPEG, converts it to a progressive JPEG, and then uses an animation to show you how that image will look loading as a progressive JPEG vs loading as a the original JPEG. You can see, for example, after 0.5 seconds, how does the progressive JPEG look vs. how much of the original JPEG is rendered? This is incredibly powerful and helpful for people focused on frontend web performance Comparing this to "file" is l
  • codezero 12y ago
    That would be great information for the author to include on the page :) I was going on the title and what I saw on the page.
    • infogulch 12y ago
      Maybe a better title would be "Comparing JPG Progressive Rendering to the Original Image"