PixelSniff is a free AI image detector that checks whether a photo was made by AI and returns a clear likelihood score from 0 to 100 percent in seconds. Upload, paste, or link a JPG, PNG, WebP, GIF, AVIF, BMP, TIFF, or HEIC image up to 50 MB, and several detection engines examine generation artifacts, noise patterns, and metadata, combining their answers into one verdict with a sample report showing each engine’s score, an AI heatmap, and the reasoning. No sign-up is needed to start: without an account you can check five images a day for free, and signing up free adds 15 credits valid for one month, with a basic check costing one credit and a deep analysis costing five. When demand is high, checks may queue, and you can leave an email to receive the result when it is ready. The site is honest about limits: detection is highly accurate on unedited AI images, but heavy compression, screenshots, and edits weaken the signals, so the score should be treated as strong evidence rather than proof. It suits journalists, moderators, sellers, and anyone verifying a suspicious image before sharing it.