QR is cool
QR is cool is an interactive demonstration of the error correction built into every QR code.
About
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.
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Likely AuthenticComposite of security, SEO, tech stack & authenticity checks · higher is better
Tech Stack
Features
Last analyzed 8/8/2026
Created by
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