PimEyes is an online face search engine that uses facial recognition technology to perform a reverse image search. It allows users to upload a photo and find out where that image appears online. The tool helps individuals track down their images on the internet, protect their privacy, and monitor their online presence. PimEyes also offers features such as accessing search results, setting alerts for new results, and erasing unwanted photos from external websites. It is a useful tool for finding similar images, auditing copyright infringement, and defending against identity theft.