How about ZeroGPT Plus tool?
ZeroGPT Plus is a free AI Content Plagiarism Checker that doesn't require a login. It's designed to spot content created by AI tools like ChatGPT, Gemini, Claude, and Copilot. Using advanced technology, it checks texts against a large database to find signs that content might have been generated by AI. Plus, this tool can also make AI-written content sound more human and natural. You can even choose from different languages and styles to suit your needs.
In addition, ZeroGPT Plus also has a "More Tools" column, where you can find functions that meet your own text needs, as well as an AI graphic prompt word generation function. All of these functions are free and very powerful. For future convenience, it is recommended to collect them.