SauceNAO

SauceNAO is a specialized reverse image search engine that has been operating since 2008, primarily designed to help users locate the original sources of images, artworks, screenshots, and visual references across the internet. Unlike general-purpose reverse image search tools such as Google Images or TinEye, SauceNAO focuses on identifying the exact origin of images, especially those from anime, manga, fan art, digital paintings, and various creative communities. The service is widely used by artists, illustrators, content creators, researchers, and casual users who want to trace the provenance of an image, find higher-resolution versions, or identify the creator behind a piece of work. When a user uploads an image or pastes a direct image URL, SauceNAO performs a visual similarity analysis against multiple indexed databases, including well-known platforms such as Danbooru, Pixiv, DeviantArt, Twitter, Tumblr, Nico Nico Seiga, Yande.re, Gelbooru, Sankaku Channel, and several others. The tool also checks against general web sources and even some proprietary databases maintained by the service. Users can choose from several search modes: "All DBs" runs the query across all available databases simultaneously; "Safeish Search" filters out results that might be classified as explicit; and individual database options allow users to restrict searches to specific sources, such as only searching Pixiv or only Danbooru. The interface is straightforward: users can browse for a file, drag and drop an image onto the page, or paste an image from the clipboard using Ctrl+V. The search results page displays a list of potential matches, each showing a thumbnail of the matched image, the source platform, the title or caption if available, the file size and dimensions, and a direct link t