TinEye is a reverse image search engine that uses image identification technology rather than keywords, metadata or watermarks. TinEye allows users to search not using keywords but with images. Upon submitting an image, TinEye creates a unique and compact digital signature or fingerprint of the image and matches it with other indexed images. This procedure is able to match even heavily edited versions of the submitted image, but will not usually return similar images in the results. TinEye is free to use. The extensions work with the latest stable builds of Firefox, Chrome, Edge and Opera.