Node.js

NodejsNode.js

Generate an image from a template with a single POST request, using the fetch built into Node.js 18 and later. No extra dependencies, and no webhook to wait on: the finished image comes back in the response.

Set two environment variables first: IMEJIS_API_KEY (from your dashboard) and IMEJIS_DESIGN_ID (any design's ID). Then send the fields you want to change as component.property pairs, for example headline.text.

Node.js (fetch)

import { writeFile } from "node:fs/promises"
 
const designId = process.env.IMEJIS_DESIGN_ID
const apiKey = process.env.IMEJIS_API_KEY
 
const response = await fetch(`https://render.imejis.io/v1/${designId}`, {
  method: "POST",
  headers: { "dma-api-key": apiKey, "Content-Type": "application/json" },
  body: JSON.stringify({ "headline.text": "Hello from Node.js" }),
})
 
const image = Buffer.from(await response.arrayBuffer())
await writeFile("output.jpg", image)
console.log("status", response.status, "bytes", image.length)

Save it as a .mjs file (or set "type": "module" in your package.json) and run it with node file.mjs.

Override any field. Each dynamic component exposes keys like headline.text, title.color, or image.image. Send only the ones you want to change. You can find a design's overridable fields in its Share / API panel.

The response is the raw image (image/jpeg by default). Save it to disk, stream it, or return it straight from your own endpoint.