PaletteBrain

PaletteBrain lets macOS users invoke ChatGPT from any application using a configurable keyboard shortcut, eliminating the need to switch windows or copy‑paste text. The app runs locally on macOS and forwards requests to the OpenAI API using a user‑provided API key, so the service can be accessed without additional accounts.

It includes a set of built‑in commands for tasks such as grammar and spelling correction, translation, summarization, bullet‑point extraction, and blog‑post generation, and users can define their own prompts to tailor the assistant to specific workflows. The shortcut‑based interface makes these capabilities available across the entire desktop environment.

The software is offered as a one‑time purchase with no recurring fees, targeting individuals and teams—particularly founders, creators, and employees—who want to streamline writing and content‑related tasks within their macOS workflow.