PixelSniff is an online AI tool that helps users determine if an image has been created or altered using artificial intelligence. The platform allows for the dragging, pasting, or uploading of images, supporting file formats like JPG, PNG, WebP, and HEIC with a maximum size of 50 MB, while also offering the capability for batch image checks. It utilizes a variety of detection engines to analyze images, looking for generation artifacts, noise patterns, and metadata inconsistencies, ultimately providing a comprehensive likelihood score along with individual results from each engine, a heatmap, and detailed explanations of its findings. This tool is particularly effective at identifying synthetic images produced by popular AI applications like Midjourney, DALL·E, Stable Diffusion, Flux, and Gemini, as well as recognizing deepfakes, face swaps, and photos edited by AI technology. While the results are informative and provide a probabilistic likelihood, they do not serve as definitive proof of authenticity. Users can access free checks without needing to create an account, and they have the option to share their reports via private, unlisted links for confidentiality and convenience. This makes PixelSniff an accessible and user-friendly resource for anyone looking to evaluate the authenticity of images they encounter online.