Node.js Example

First, sign up for the basic plan for a free development API key. Please replace API_KEY in the code example below with your own API key.

This example requires Node.js 18 or later (fetch is built in). Follow these steps to create a sample project:

mkdir ZplTest
cd ZplTest
npm init --yes

Create a new file zpl.js with the following content:

const fs = require('fs');

const API_KEY = 'API_KEY';

async function main() {
  const html =
    '<h1 style="font-size:40pt;margin:0.5in">Hello World!</h1>' +
    '<p style="font-size:25pt;margin:0.8in">ZPL label generated by <u>htmltozpl.com</u></p>';

  const response = await fetch('https://html-to-zpl.p.rapidapi.com/html2zpl', {
    method: 'POST',
    headers: {
      'x-rapidapi-host': 'html-to-zpl.p.rapidapi.com',
      'x-rapidapi-key': API_KEY,
      'content-type': 'application/x-www-form-urlencoded',
    },
    body: new URLSearchParams({
      width: '4',
      height: '2',
      html,
    }),
  });

  if (!response.ok) {
    throw new Error(`API error ${response.status}: ${await response.text()}`);
  }

  const zpl = await response.text();
  fs.writeFileSync('node-html-to-zpl-example.zpl', zpl);
  console.log(zpl);
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
});

Run it by typing:

node zpl.js

You should see the resulting ZPL written on the console, and also saved to the file node-html-to-zpl-example.zpl.