Prompt Box

Prompt Box is a browser extension for saving, organizing, and reusing AI prompts across chatbots like ChatGPT, Claude, Gemini, and DeepSeek. Instead of retyping or hunting through chat history for a prompt that worked well before, users build a personal prompt library organized into folders, fill in variables to customize a saved prompt before use, and insert it into the chat input box with one click. Saved prompts sync across devices through a connected Google account, and prompts can be searched by title, content, or tag, which is useful for anyone who has built up a large collection over time. The tool targets AI power users, prompt engineers, and teams who want to avoid losing or reinventing prompts that already work. Prompt Box is offered as a free browser extension, with the company stating there are no subscriptions or hidden fees. What is not confirmed from research is whether the tool offers a public API, third-party integrations beyond the supported chat platforms, or team-specific collaboration features beyond basic sharing. As with any browser extension that reads and writes into AI chat interfaces, its reliability depends on those platforms' pages not changing their layout in ways that break the injection feature.