Why Do QR Codes Work on Both Sides?

QR codes are like a picture puzzle that works whether you look at it from the front or back. They have mirrored shapes, so even if you flip them over, they still make sense to the scanner. It’s like having a secret message that reads the same forwards and backwards.

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Examples

  1. A label on a soda bottle with a QR code that still works when you flip it over.
  2. You scan your friend's QR code from the back of their phone, and it still works.
  3. A poster has a QR code, but it’s printed in such a way that both sides are usable.

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Categories: Technology · QR code· technology· coding· design