An extensible, customizable, free/libre text editor — and more.

About GNU Emacs

GNU Emacs is a versatile and powerful text editor that has been a cornerstone of the open-source software community for decades. Its extensibility and customization options make it a favorite among developers and enthusiasts alike. With a rich history rooted in the philosophy of free/libre software, GNU Emacs offers a unique platform for users to craft their ideal editing environment. From content-aware editing modes to complete Unicode support, Emacs caters to a diverse range of users, enabling them to work with various file types and languages seamlessly. The software's wide range of functionality goes beyond traditional text editing, providing tools for project planning, email management, debugging, and more. Emacs is not just a text editor; it's a symbol of the collaborative spirit and innovation that define the open-source movement.

• Complete built-in documentation

  Complete built-in documentation, including a tutorial for new users.

• Full Unicode support

  GNU Emacs has full support for Unicode, which is the universal character encoding standard that covers the majority of the world's writing systems. This means Emacs can handle and display text in a wide range of languages and scripts, including those that use non-Latin characters. Users can work with text in languages that utilize scripts such as Chinese, Japanese, Korean, Arabic, Cyrillic, and many others, with Emacs providing comprehensive support for these diverse writing systems.

• Highly customizable

  Highly customizable, using Emacs Lisp code or a graphical interface.

• A wide range of functionality beyond text editing

  A wide range of functionality beyond text editing, including a project planner, mail and news reader, debugger interface, calendar, IRC client, and more.

• Content-aware editing modes

  Content-aware editing modes, including syntax coloring, for many file types.