MiniFonts are intended to be used for small amounts of text in menus, navbars, banner ads and captions. In general, it is better to use regular ‘Verdana, Arial, Geneva’ typefaces for body text on a Web page because
(a) it requires fewer bytes,
(b) it can be resized by the surfer if necessary and
(c) it can be searched and indexed.
Remember, if your page contains only images and no text, it is unlikely to be seen as ‘important’ by search engines such as Google and will get a low ranking.
If you still want to set a larger amount of text with your MiniFonts for stylistic reasons, here are some tips.
Save your GIF at the lowest possible bit depth (usually 1-bit). It doesn’t matter if it has a transparent background or not. At 1-bit, you can get a reasonably large image under 1k. Blank space compresses very efficiently so don’t be too concerned about wide letter or line spacing, it won’t make much difference to the file size.
Remember it is an image. It should have an <img alt=”…”> attribute to provides a synopsis of the text when images are turned off or when screen reading software is used. You must have an <img alt> attribute for your page to validate.
You can also use the <img title=”…”> attribute to provide a ‘tooltip-style’ context-sensitive help message in some browsers when the mouse passes over the image.
Either, or both of these will give search engines something to latch onto.