TanShilongMario/PromptFill

What it solves

Prompt Fill is a structured prompt generation tool designed to eliminate the difficulty of remembering, managing, and modifying complex prompts for AI painting (such as Midjourney, GPT, and Nano Banana). It transforms the prompt creation process into a visual "fill-in-the-blank" interaction, making it easier to iterate on artistic styles and parameters.

How it works

The tool uses a structured prompt engine where users define templates using a {{variable}} syntax. These variables are then rendered as interactive dropdown menus in a preview mode. Users can manage a dynamic bank of preset art tags and categories, which can be dragged and dropped into the editor or selected via an autocomplete panel (triggered by / or {).

Who it’s for

Digital artists and AI art enthusiasts who use image generation models and need a way to organize their successful prompt structures and quickly swap variables to create variations.

Highlights

• Variable Autocomplete: Dual-column panel for selecting variables and options with keyboard navigation.
• Intelligent Bank Management: Color-coded categories for art tags with bidirectional sync between the preview and the bank.
• Smart Split: One-click splitting of existing prompts into annotated variables and bilingual templates.
• Multi-Template System: Support for independent templates with isolated states and cloning for A/B testing.
• Flexible Storage: Data is stored locally via IndexedDB or LocalStorage, with options for JSON import/export.
• Visual Export: Ability to export generated prompts as high-definition JPG long images for social sharing.