A knife with line cutter generally includes a knife blank having a main blade on one end and a line cutter on the opposing end of a tang. The line cutter has a sharpened edge on the inner curve of a hook at the end of the tang, and may extend from the handle or be recessed within the end of the handle. The tang may comprise a tang extension that allows the line cutter to transition from a retracted position to an extended position outside of the handle. The extension assembly may include a spring and/or a locking mechanism. Alternatively, the line cutter is a recessed diagonal blade. A method of forming a knife with line cutter generally includes forming a knife blank comprising a blade, tang, and line cutter forming a handle and securing the knife blank to the handle.