Building Dynamic QR Code Systems with Node.js

What Are Dynamic QR Codes? Traditional QR codes embed a static URL directly into their pattern. Once printed, that destination is permanent. Change your website? Your printed codes become useless. Dynamic QR codes work differently. The printed pattern contains a short redirect URL (like uqr.ai/r/abc123 ). When scanned, this URL hits a server that looks up the current destination and redirects the user there. The destination can be updated anytime without changing the printed code. How it works: You create a QR code with type dynamic (type_id: 2 in the API) The API generates a short URL that points to their redirect service You print this QR code anywhere Later, you can update where that short URL points to via API Scans always go to the current destination This enables use cases like: Restaurant menus that change daily Product packaging that links to different campaigns by season Event badges that show different info each day Marketing materials that A/B test different landing pages AP