PrePrompt

PrePrompt is a browser extension that adds a Rewrite button to the chat boxes of ChatGPT, Claude, Gemini and Perplexity. A user types a vague prompt, clicks Rewrite, and the extension replaces it with a more specific one that includes missing context such as audience, output format, stack or timeline. It also works with VS Code and through MCP, drawing on the same credits. The vendor positions it for marketers, founders, developers and students who want better answers without learning prompt engineering. Each rewrite is also meant to serve as a worked example of a good prompt. Local checks that pass clear prompts through untouched, flag a secret or ask for clarification cost no credits. The privacy section says that by default only the prompt text the user chooses to rewrite leaves the browser, that the extension does not read other tabs or conversation history, that prompt text and rewrites are not stored, and that rewriting is done through a single call to Anthropic's API. The Chrome extension is described as launching soon, with a waitlist open. The Free plan costs $0 for 30 rewrites per month across all four chat sites. Developer includes 500 credits per month and Pro includes 1,500, but their prices are listed as revealed at launch. A standard rewrite uses one credit. Team pilots are listed at $20 per seat per month with a three seat minimum, and paid plans are currently limited to Canada and the United States.