AI Signboard Prompt Generator - by Quảng Cáo Quốc Đăng

AI Signboard Prompt Generator is a free browser extension for Chrome, Firefox, and Microsoft Edge, built by Quoc Dang, a signage design and fabrication company based in Hanoi. The tool helps shop owners, signage companies, and designers quickly create detailed AI prompts to visualize new signboard concepts, without needing any prompt writing skills or design software. Users simply select their business type, sign type such as aluminum composite panel signs, acrylic channel letter signs, LED light box signs, printed vinyl banners, or flag signs, along with design style, storefront width, color tone, time of day, and camera angle. The extension instantly assembles a complete, ready-to-use prompt for AI image generators like ChatGPT, Gemini, Claude, Grok, and Microsoft Copilot. The standout feature is Photo Mode, which lets users upload a real photo of their storefront. The extension then optimizes the prompt so the AI generates the new signboard design directly on that actual building facade, instead of a generic scene. This is especially useful for signage fabrication companies, advertising contractors, and shop owners who want a realistic before-and-after preview of a new storefront sign or illuminated sign box before committing to production. The extension supports 7 in-app UI languages, including English, Vietnamese, Arabic, Chinese, French, Russian, and Spanish, and includes a favorites and history list so useful prompts are never lost. It runs entirely on the local browser with no data sent anywhere, making it a fast, free, and privacy-friendly tool for anyone planning to design or upgrade a shop sign, storefront sign, or LED signboard.