What is PixelSniff?
PixelSniff is a free AI image detector that tells you how likely a picture is to be AI-generated. Upload a JPG, PNG, WebP or HEIC image (up to 50MB, batch supported) and several detection engines analyze generation artifacts, noise patterns and metadata. You get a combined AI likelihood score, per-engine scores, an AI heatmap and reasoning. It recognizes Midjourney, DALL·E, Stable Diffusion, Flux and Gemini images, deepfakes and face swaps. No sign-up needed.