About Promptnomicon

The digital grimoire of AI prompts

What is Promptnomicon?

Promptnomicon is an AI prompt generator built for creators who work with image generation models. It turns a plain description — or an uploaded reference image — into a structured, model-ready prompt optimised for the generator you are targeting.

Whether you need a Midjourney prompt with the right --ar flags and --v 7 parameters, a Flux cinematic prose description, or a Stable Diffusion weighted-tag sequence for Automatic1111 or ComfyUI, Promptnomicon formats the output for each model's unique syntax so you don't have to.

The Problem It Solves

Every major AI image generator expects a different prompt structure. Midjourney rewards natural language paired with specific parameters. Stable Diffusion works best with Danbooru-style comma-separated tags and weight notation — (subject:1.3). Flux prefers dense, cinematic prose with no special syntax.

Writing high-quality prompts for each model separately is time-consuming and technical. Promptnomicon automates that translation so you can focus on the creative work.

How It Works

• Text-to-prompt — describe your idea in plain language, choose your target model, and receive a fully structured prompt plus a negative-prompt list tailored to that generator.
• Image-to-prompt — upload a reference image. The AI analyses it, writes a detailed visual inventory, then converts it into a prompt that faithfully reproduces the scene in the format you need.
• Improve & Vary — refine an existing prompt with targeted variations or improvements without losing its original structure.

Supported Output Styles

• Flux — flowing natural-language prose, minimal constraints, cinematic detail.
• Midjourney — descriptive language with --ar, --v 7, and --style raw parameters.
• Stable Diffusion — Danbooru-style atomic tags, structural order, weight discipline, anatomy safeguards.
• Universal — balanced syntax compatible with all major AI image generators.

Free Tier

Every account includes 3 free spells per month — no credit card required. Spells work in both Arcane (SFW) and Forbidden (adult content) modes. Additional spell packs are available on the pricing page.