Umlaut Letters is a free browser tool for one-click copying and typing of German umlauts and accented letters, including Ä, Ö, Ü, and ß, along with other accented characters. It provides keyboard shortcuts for Windows, Mac, and mobile, plus Unicode, Alt code, and HTML code reference pages for learning and everyday use. Created by Umlaut Letters, a California studio founded in 2026 by Hetal Jani, the tool is free to use with no signup required.