Uzbl is a free and open source minimalist web browser designed for simplicity and adherence to the Unix philosophy. Development started in early 2009 and is still considered in alpha software by the developers. The core component of uzbl is developed in C but other languages are also used, most notably Python. All parts of the uzbl project are released as free software under the GNU GPL version 3.

The name comes from the word usable, that is spelled in lolspeak.

Despite being in early stages of development, Uzbl has already gained prominence as one of the best minimalist browsers.

Uzbl follows the Unix philosophy, “Write programs that do one thing and do it well. Write programs to work together. Write programs to handle text streams, because that is a universal interface.” As a result, Uzbl does not contain many of the features of other browsers. Uzbl has none of its own toolbars or widgets, and does not manage bookmarks, history, downloads, or cookies, leaving them to be handled by external programs or scripts like uzbl_tabbed for tabbed browsing support. For interaction with the program it can read input from standard input (FIFO pipe) or from POSIX local IPC sockets or it can be passed text files as it happens with the configuration file. This design is considered a benefit and not a drawback, allowing for more customization.^[who?]