The Free Online Voice Recorder by Speak Ai allows users to easily record their voice directly from their browser without any cost. Users can record audio for up to five minutes, with the option to extend to 30 minutes by signing up for a free trial. The service also offers transcription capabilities, enabling users to convert their recordings into text. With a user-friendly interface, the tool is compatible with various devices and browsers, making it accessible for anyone looking to capture and transcribe audio effortlessly.