n8n Webhook AI Prompt Generator for Image Ideas

Turn an image idea into an AI-ready prompt—automatically via n8n Webhook

This n8n workflow receives an image idea through a webhook and instantly generates an optimized AI image prompt, a negative prompt, and suggested image settings (style, mood, lighting, and aspect ratio)—ready to use on image-25.net.

What this workflow does

• Accepts a POST request on the production webhook endpoint named ai-image-prompt-generator, including your idea (required) and optional fields like style, mood, lighting, and aspectRatio.
• Normalizes inputs with defaults when optional values are not provided—so you always get a complete, usable result.
• Builds an optimized prompt string plus a negative prompt list using n8n logic.
• Derives orientation (landscape/portrait/square) from the supplied aspect ratio.
• Returns results in the webhook response: optimized prompt, negative prompt, suggested settings, and a link to generate the image on https://image-25.net/.

Use cases

• SaaS operators who want an API-like prompt generator for user-submitted image concepts.
• Automation engineers building a custom pipeline that converts ideas into consistent AI image prompts.
• Marketing teams generating prompt suggestions for campaigns while keeping style/mood/lighting consistent.
• Prototyping workflows where you want to test prompt variations without manually formatting prompt text.

Technical details

• Uses n8n nodes: webhook, set, code, and `sticky note`.
• Implements input defaults and prompt construction entirely with n8n logic.
• Endpoint: production webhook URL for the ai-image-prompt-generator endpoint.

Activate the workflow, copy the production webhook URL, and integrate it into any app or client by sending JSON to generate AI image prompts on demand.