Mostly speed and consistency. If you've caught yourself retyping the same "explain this simply, use bullet points, keep it short" instructions in a new chat for the third time this week, that's exactly the annoyance this solves. Pick your settings once, get a properly labeled prompt every time, and ChatGPT tends to follow it more reliably than one long freeform request.

Yes. The output is just plain text, nothing ChatGPT-specific is baked into it, so pasting it into Claude, Gemini, Copilot, or Perplexity works exactly the same way. It's named after ChatGPT mainly because that's the chatbot most people actually use.

Because chat models parse labeled sections better than one dense wall of text. Role, task, tone, format, and anything else you picked each get their own paragraph, so nothing gets buried in a single long sentence. That's a deliberate difference from a tool built for AI image or video generators, where a single comma-separated line of short tags is actually the better format, since those models read prompts as keywords rather than instructions.

No, none of that. Everything runs locally in your browser and never touches OpenAI's API. You'll still need your own ChatGPT, or whichever chatbot, account once you're ready to actually send the finished prompt somewhere, but that part happens on their site, entirely separate from this one.