Image2Html is a free program that converts normal or animated images in HTML colored characters. It has a lot of settings and allows you to upload the final files on the Beneton Software server to show them to everyone on the Internet. One other feature is converts an image to a full-color ASCII art that may be rendered in any common web browser. No need to install, just unzip and use it. It also provides a lot of customizations for better results. Go through the sample pages if you want to check the results. Below is image of select HTML ascii art converted from an image.
You can also test this online here without any software download. This converts an image any URL to ascii art.