Paste code, pick how you want it explained, get an answer. 6 modes, overview, beginner, line-by-line, advanced, security audit, and refactor. Each built for a different situation. A chat panel stays aware of your code the whole time, so follow-up questions make sense without starting over. Works with Gemini, Claude, or OpenAI. Gemini is free if you don't have a key yet. Windows, Mac, Linux. Your code stays local.