PixelSniff

PixelSniff is a free AI image detector that tells you how likely a picture is to be AI-generated. Drop, paste or upload a JPG, PNG, WebP or HEIC image of up to 50MB and several detection engines analyze it. You get a combined AI likelihood score with a verdict, per-engine scores, a heatmap and reasoning, and you can check images in batches. No sign-up is needed. Detection scores are estimates, not proof.