n8n Webhook Image Studio with Google Gemini AI

Turn uploaded references into studio-ready images via an n8n Webhook—powered by Google Gemini

Use this n8n Webhook Image Studio with Google Gemini AI to spin up a self-hosted HTML “Image Studio” page, accept one or two reference uploads, and generate or edit images using Google Gemini. The workflow returns a downloadable data URL along with the exact prompt and metadata—ready for a smooth, repeatable creative loop.

What this workflow does

• Serves a self-hosted HTML interface on a GET request to the /gemini-image-studio webhook, with configurable title and upload limits.
• Processes generation/edit requests via a POST request from the page, including selected mode plus optional flags (brand/notes/format-related options as provided by the UI).
• Validates and enforces limits (image count/size/type), then converts up to two base64 images into binary attachments.
• Builds the final Gemini prompt based on the selected mode:
  • Text-to-image (0 images)
  • Single-image edit (1 image)
  • Two-image composite for “space + brand logo” (2 images)
• Retries Gemini twice on transient errors before failing.
• Returns results as JSON containing: the generated image as a data URL, filename, size, elapsed time, and the exact prompt used.

Use cases

• Create consistent product visuals from a packshot or design reference using clean packshot or product ad modes.
• Generate “space” scenes with people or brand placement using the space with people and space with brand logo modes.
• Build an internal creative tool for your SaaS team: upload references, iterate with prompt transparency, and re-feed outputs as the next reference.

Technical details

• n8n nodes/logic: if, set, code, merge, switch, webhook
• Integration: Google Gemini (text-to-image and image edit/composite routing)
• Workflow design: Gemini node retry (2 attempts), request validation, base64-to-binary conversion
• Performance safeguard: the browser downscales/compresses uploads before sending to stay within n8n payload limits