AI Signboard Prompt Generator is a free browser extension for Chrome, Firefox and Edge, built by Quoc Dang Advertising, that helps shop owners, sign makers and design agencies generate detailed AI prompts for signboard design, storefront signage, and shop sign mockups in just a few clicks.

The problem it solves:

Creating a signage concept with an AI image generator normally means typing out a long description yourself, covering sign type, business category, design style, color palette, lighting and camera angle, which is time-consuming and easy to get wrong. This extension removes that friction by turning simple dropdown selections into a structured, platform-optimized signboard prompt, so your AI-generated storefront sign design looks accurate and professional on the first try.

Key features:

- Generate a detailed signboard design prompt by selecting business type, sign type, style, color tone, time of day and camera angle

- Real-photo mode: upload your actual storefront photo and the AI composites a new signage design directly onto it, keeping the building and surroundings unchanged

- Prompt formatting tuned for multiple AI image tools including ChatGPT, Gemini, Grok and Microsoft Copilot

- Built-in negative prompt presets that reduce blurry text, distorted lettering and watermark artifacts common in AI-generated signboard mockups

- Save favorite signboard concept combinations for reuse or comparison

- Multi-language interface with light/dark mode and a draggable, resizable floating panel

- Fully local processing, no photos or data uploaded to any server

Who it's for:

Signage and advertising companies, shop owners planning a new storefront sign, marketing agencies preparing signboard design concepts for clients, and anyone who wants a fast, realistic sign mockup preview before committing to real fabrication and installation.

How to get started:

Install the free extension from the Chrome Web Store, Firefox Add-ons or Edge Add-ons, click the extension icon on any webpage (even directly on your AI tool's chat page) to open the floating panel, choose your business type and signage preferences, then use Copy Prompt or Copy Prompt + Photo and paste it into your preferred AI image generator.

What makes it different:

Unlike manually writing signage prompts, this extension auto-formats prompts per AI platform, supports real-photo compositing for an accurate before-and-after storefront sign preview, and connects directly to Quoc Dang's in-house signboard fabrication workshop so a favorited AI concept can be turned into a real, installed sign.