The "Text to Banner" tool converts what you type into large, decorative letters that are drawn with ordinary characters instead of images. Every letter in your text is re-drawn as a small multi-row shape made of # signs, strokes and dots, and the shapes are joined side by side so the whole word becomes one tall banner.
It does this with two letter sets that were written for this site: a Block set with tall seven-row letters for headings you want to shout, and a Slim set with short four-row letters for places where the banner must stay compact. It is useful because plain text cannot be made larger by a font – chat messages, code comments, README files and forums only take characters – and a banner is the reliable way to make a heading impossible to miss in any of them.
Everything runs in your browser with JavaScript, so nothing you type is sent anywhere. Input text is uppercased automatically so every letter lines up, and each input line becomes its own banner block, with a blank line between blocks when you banner several lines at once.