AnonChatGPT

AnonChatGPT is a familiar version of ChatGPT that can be used anonymously, without registration or restrictions. It has the same capabilities as the original and supports multiple languages.

You can use it here: anonchatgpt.com. The only thing the service may ask before starting is to complete a CAPTCHA to prevent bots. Other than that, everything is familiar – a simple chat-based conversation.