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Show HN: An interactive demo of QR codes' error correction
QR is cool is an interactive demonstration of the error correction built into every QR code. Draw on a QR code and see how the decoder works inside.
Every QR code has built-in error correction. This means that they can still be scanned even if they are damaged, like when a corner is covered or torn off, or when they get drawn on. Pick any QR code to learn more.
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