The first recommendation of the day is typorganism, which can convert images into characters. The only requirement is that the image must be a 60px x 50px JPG file. It can generate an HTML page, but you'll need to extract the code yourself. One downside is that you cannot customize the characters; they are all automatically generated by the system.
I've played with similar websites in the past. Although those sites generated colorful character images, I always felt they weren't as fun. Sometimes, people just prefer this kind of minimalist style—simple and elegant—and that's what seems to have a market. After introducing typorganism, I will share some other online character image generation websites with you.
Below is the HTML code generated from my photo. What do you think? Isn't it awesome! Interested? Don't just sit there—go give it a try!