These require icons for new contexts like application launchers, menu bars, toolbars, and on the desktop. Most favicons are created only for the web browser context, which by default is 16x16 pixels. This is fine in that context, but increasingly, favicons are being used in other contexts as well, usually larger. Low resolution 16x16 favicons look ghastly and pixelated when enlarged to sizes like 32x32, 64x64, or x pixels for other contexts, like the application icons for application launcher bars and application toolbars.
ICO files have the additional property that they somewhat non-intuitively can contain multiple images within one file, namely multiple versions of the same icon, but at different colour depths and pixel resolutions. To provide the maximum favicon compatibility and utility, this morning I wanted to work out how to create a multi-resolution favicon. On principle, I like to achieve my computing ends using only open source software.
A quick Google search indicated that I could create. The result is a. Now, depending on the context, visitors to your site will see your nice favicon in their browser tabs, superimposed on whatever browser chrome they're using in all of its transparent glory.
Similarly, if they use Adobe Air or Prism to create an icon for your site on their desktop, or want to save your site on their iPhones, they should get the appropriately sized full-resolution icon for their launch menu, or desktop! One point to note: there's no reason that the logo needs to be the same at each resolution. I suppose you could add a bit of text, e. TIFs often used by Mac people are a good image format for high-fidelity photo work, but totally inappropriate for the web, because they are bulky lots of bytes and tend not to be supported by most browsers.
JPGs are an option, but if your logo is a line drawing or a computer-generated image as most logos are , they tend to provide a poor reproduction due to their "lossy compression algorithms" don't ask - beyond the scope of this article particularly at small sizes - plus JPG doesn't support transparency at all. GIF images offer only 1 bit alpha transparency on or off which leads to icons with jagged edges that tend to blend with their backgrounds like oil does with water i.
The PNG format supports 8 to 32 bit transparency, allowing for those smooth feathered edges that look much better to even the untrained eye, so that's the best starting point. It's specifically designed for the web, but unfortunately, Microsoft didn't have the foresight to implement support for PNG's graphical capabilities in IE 6.
Luckily, IE6 is slowly dying out on the Web as people move to better browsers like Firefox. They want a 16x16 image, and it makes the design look awful. That's odd -- it's always worked for me. Thank you soo It worked perfectly. I used 48x48 and 8bpp.
Icon looks great. I tried and tried and for some reason I couldn't get the favicon to show up transparent following a bunch of other people's instructions. Not sure if was the GIF saving part or the 8bpp that did it but either way, it worked! Thanks so much! Skip to main content. They are container files that contain images at multiple resolutions and bit depths. Considering the various roles that icons play this is fairly obvious when you think about it. Then again, I had never seriously thought about icons before so it was news to me.
After a brief bout of despair from finding nothing but pricey proprietary programs for producing icon files, I realized that Gimp could export ICO files. Enter iconify , a Script-fu plugin for Gimp. After running the script, my Gimp project was populated with layers containing resized versions of the original image corresponding to the various icon resolutions Windows desires: Ookibloks icon layers in Gimp after running iconify.
Now, when I exported an icon file, Gimp would automatically match up the layers: Exporting the Ookibloks icon data from Gimp.
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