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A QR code (Quick Response) is a two-dimensional matrix barcode encoding data in a grid of squares — readable by any modern smartphone camera in under a second, no app required.
Invented by Denso Wave to track car parts. Today used by billions across payments, menus, marketing, healthcare, and events.
That's 200× more than a 1D barcode — enough for a full URL, vCard contact, WiFi credentials, or a short message.
Reed-Solomon error correction lets your code scan reliably even when dirty, creased, or partially covered by a logo.
Every modern smartphone decodes QR codes natively via the default camera — frictionless for every user, everywhere.
Your phone silently runs a five-stage decoding pipeline — invisible, instant, and extraordinarily reliable.
The camera finds the three corner squares to locate and frame the QR code in the viewfinder.
Perspective and angle are corrected using alignment patterns — the code reads correctly at any tilt.
Each black or white cell is read as 1 or 0 — thousands of bits decoded in milliseconds.
Reed-Solomon corrects damage up to 30%. The payload instantly opens a URL, saves a contact, or connects to WiFi.
"Generated 50 QR codes for our hotel room doors in under 20 minutes. No fuss, no signup — just paste and download. The fastest tool I've used by a long stretch."
"Used this for contactless restaurant menus and kept using it ever since. Every code scans perfectly, even on glossy laminated card."
"The elegant dark design is a pleasure to use. The educational sections genuinely taught me things I didn't know — Reed-Solomon error correction was a surprise bonus."
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