QR codes

Every short link has a QR image served publicly by the redirect host at GET /:shortCode/qr — no authentication required. Because it's a plain image URL, you can build it yourself; the planned TypeScript SDK (not published yet) builds it for you instead of making an API call.

Build a QR URL

const qrUrl = leonai.qr.buildUrl('spring-sale', {
  size: 512,
  format: 'svg', // png | svg | dataurl
  color: '#111111',
  backgroundColor: '#FFFFFF',
  errorCorrectionLevel: 'H', // L | M | Q | H
  margin: 4,
});
// -> https://short.leonai.io/spring-sale/qr?size=512&format=svg&...

Options

Option	Values	Notes
size	pixels	Width/height of the square image
format	png, svg, dataurl	dataurl returns an inline data: URI
color	hex	Foreground (module) color
backgroundColor	hex	Background color
errorCorrectionLevel	L, M, Q, H	Higher levels tolerate more damage/logo overlay
margin	integer	Quiet-zone modules around the code

Use it directly

Since the URL is public, drop it straight into an <img> tag, a print asset, or a PDF:

<img
  src="https://short.leonai.io/spring-sale/qr?size=512&format=png"
  alt="Scan for the Spring Sale"
  width="256"
  height="256"
/>

Dynamic QR codes point at the short link, so you can change the destination later (via link update) without reprinting the code.