How do I improve scan reliability if the result looks good but won’t scan?

Increase the QR visibility setting, reduce the overall style strength near the code, keep a clear quiet zone (blank margin) around the QR area, and avoid extreme blur or heavy texture over modules. Also test under normal indoor lighting and ensure the final crop doesn’t cut into the code edges.

Can I guide the look with a reference image instead of a text prompt?

Yes. Provide a reference image to the custom QR node. The node will align textures and edges to the QR matrix while borrowing colors and structure from your reference. If the code becomes hard to scan, reduce style strength or simplify the reference.

What image size works best?

Start with a square canvas to keep the QR proportions consistent. Higher resolution improves detail, but ensure the QR modules remain crisp with good contrast. For print, generate at the final print size or plan to upscale with care and re-test scanning afterward.

Where do the images save?

The SaveImage node writes the outputs as PNG files in your ComfyUI/output folder. Each run will create a new file; use the seed or naming options to keep versions organized.

Workflow

QR Code Image Generator

Turn an ordinary QR code into artwork. Instead of a plain black-and-white square, this blends your code directly into an image — the pattern becomes part of the composition, hidden in the textures, shadows, and shapes of the scene rather than stamped on top of it. The result still scans reliably with any phone camera, but it looks like something you'd actually want to put on a poster, album cover, business card, or product label. Just supply your link and a prompt or reference image describing the look you want, and you'll get back a piece that works as both a picture and a working code.

Try on Comfy Cloud Download Workflow

Use this workflow from code

Every Comfy workflow is a JSON graph. The payload below is this workflow, exactly as ComfyUI runs it — fetch it from the URL, keep it in version control, or load it in ComfyUI and run it node by node.

9fbb34bb59b3.json

Fetching workflow JSON…

Run it from TypeScript or Python with the Comfy SDK. The same code targets Comfy Cloud or a ComfyUI you host yourself — only the base URL changes.

// Install (beta)
npm i @comfyorg/sdk

// Run this workflow (TypeScript)
import { Comfy } from "@comfyorg/sdk";

const client = new Comfy({ apiKey: "comfyui-..." });
const wf = await client.workflows.fromFile("workflow_api.json");
const job = await client.run(wf);
await job.getOutputs("<output-node-id>")[0].toFile("output.png");

The SDK takes a workflow in API format: open this workflow in ComfyUI and use File → Export Workflow (API).

Comfy Cloud API access requires a plan with an API key.

SDK docs Get an API key

FAQ

Frequently Asked Questions