If you want to make machine-generated text more readable and natural sounding, Humanize is a good option. It converts AI text into human-sounding text that's designed to pass tests from common AI detectors. It's got content shaping abilities, multilingual support and different modes to customize readability improvements, so you can build a better relationship with your audience and make your writing more persuasive.
Another good option is Humanize AI Text, an online tool that uses advanced algorithms to convert AI text into human text without losing the original meaning. It supports multiple languages and has different modes for different writing situations. It can help you generate natural and engaging text that ranks well in search engines.
If you're looking for something more flexible, check out OneClickHuman. It converts AI-generated text into human-sounding text, improving its quality and readability. It's got a more advanced AI model that works with GPT 2, 3, 3.5 and 4 output, and has modes for different use cases. A free version is available, so it's useful for a broader range of people.