what is the best free ai image editor that allows unlimited uses and no sign up at all

As of my last update, here are a few free AI image editors that allow unlimited use without the need for sign-up:

**Photopea**: This is a web-based image editor that mimics Adobe Photoshop. While it doesn't have specific AI features, its extensive toolkit allows for various image editing tasks, and it doesn't require registration.

**Pixlr**: Pixlr offers a powerful editor with some AI features, such as automatic background removal. You can use it without needing to create an account, though there may be ads.

**Remove.bg**: This tool focuses on removing backgrounds from images using AI. It allows you to use its primary feature freely, with no sign-up required, although there may be limits on the resolution of the output.

**Paint.NET**: While not entirely web-based, Paint.NET is a free image editor you can download that has a strong community and many plugins, some of which incorporate AI features. 

**DeepAI**: This platform provides various AI-based tools for image generation and editing. It operates without requiring registration.

Make sure to check the websites to ensure they still follow these policies, as terms and conditions can change.