Free WebM to MP3 Converter software (version 1.3) is a user-friendly program that enables users to convert WebM videos to MP3 audio files. The software supports batch processing, allowing users to convert multiple files at once. It also offers various customization options, such as the ability to adjust the bit rate, sample rate, and channel of the output file. The program is free to download and use, and it is compatible with Windows operating systems.