The best alternatives to Yout are CONV., JAYC.audio, and YouTube in MP3. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
GIFRUN is a freemium service to create high-definition animated GIF and WebP images on desktop and mobile browsers. The services offers a fast and easy way to create highest quality content from various sources such as YouTube, video upload, and more.