Blackbox AI is an AI-powered tool for developers to search and autocomplete code snippets in over 20 programming languages. It offers code search across more than 100 million open-source repositories and is available as a Chrome extension that allows users to copy code snippets from videos and PDF documents. It also offers query_stat to turn questions into code and does not require a credit card to start using. The tool has received positive reviews from users and is designed to make developers write code faster.