
Description: 4k YouTube to MP3 is a free web-based tool that allows you to convert and download YouTube videos as MP3 audio files. It supports extracting audio from YouTube videos up to 4K resolution.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: MP3 Grabber is a free software that allows users to download MP3 audio files from YouTube and other streaming sites. It can detect audio streams and save them as MP3 files on your computer.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API