Shopify has a tool for it, did you try this? https://www.shopify.com/tools/qr-code-generator
Topic summary
A user’s QR code for their Shopify website stopped working after a few days and is seeking help to generate a permanent solution.
Suggested Solutions:
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Shopify’s Built-in Tool: Navigate to Marketing > Create Campaign > Create QR code in the admin panel. Customize the destination (homepage, product page, etc.) and download the code.
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Shopify’s Standalone Generator: Use the official tool at shopify.com/tools/qr-code-generator for quick generation.
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Third-Party Generators: Services like QR Code Monkey, QRCode Generator, or Scanova offer more customization options (design, colors, logos).
Key Warning:
The issue may stem from using “spammy” free QR code generators that initially work but later disable codes to force paid subscriptions. QR codes themselves don’t expire naturally. One user recommends Uniqode as a reliable third-party option but emphasizes checking reviews before choosing any service.
Best Practice: Always test generated QR codes and verify the destination URL remains active. Consider the risk of printing codes on promotional materials before confirming reliability.