How Dynamic QR Codes Work

Overview

A dynamic QR code does not encode your final destination URL directly into the pattern of black and white modules. Instead, it encodes a short redirect URL hosted by QR Dex -- something like qrdex.io/XXXXXXXX. When someone scans the code, their device opens that short URL, and QR Dex instantly redirects them to whatever destination you have configured in your dashboard. Because the QR code itself only contains the short redirect URL, you can change the destination at any time without altering the printed code.

The Redirect Flow

Here is what happens each time a dynamic QR code is scanned:

  1. Scan. A user points their phone camera or QR code scanner at your code. The device reads the encoded data, which is the short redirect URL (e.g., qrdex.io/Ab3kQ9xZ).
  2. Request. The device opens the short URL in a browser, sending a request to the QR Dex server.
  3. Log. QR Dex records the scan event, capturing metadata such as the timestamp, approximate geographic location, device type, operating system, and browser.
  4. Redirect. QR Dex looks up the destination URL you have set for that code and sends back an HTTP redirect. The browser follows the redirect and loads your destination page. The entire process takes only milliseconds, so the experience feels instant to the person scanning.

Key Benefits

Because the redirect layer sits between the QR code and the final destination, dynamic codes unlock several powerful capabilities:

  • Update the destination anytime. Running a seasonal campaign? Swap the landing page URL from your summer sale to your winter promotion without reprinting a single poster, flyer, or business card.
  • Track every scan. Each scan passes through QR Dex, so you get a complete record of when, where, and how often your code is scanned.
  • Collect detailed analytics. View scan trends over time, geographic heat maps, device breakdowns, and more from the QR Dex analytics dashboard.
  • A/B test destinations. Experiment with different landing pages to see which one converts better, all from the same physical QR code.

Dynamic vs Static

A static QR code encodes the final URL directly into the code pattern. Once printed, the destination cannot be changed and no scan data is collected. Static codes are fine for simple, permanent links, but they offer no flexibility or analytics.

Dynamic QR codes require a paid QR Dex plan because the redirect infrastructure -- fast servers, scan logging, and analytics processing -- runs continuously on your behalf. If you are using QR codes in any scenario where you might need to update the link later or want to measure performance, a dynamic code is the right choice.

When to Use Dynamic QR Codes

  • Printed marketing materials such as brochures, posters, and packaging.
  • Business cards where you may change your website or portfolio link.
  • Restaurant menus that get updated seasonally.
  • Event materials where schedules or venue details might change.
  • Any situation where reprinting is expensive or impractical.

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