Size & Specs
What Is the QR Code Grid?
The "grid" refers to the overall square arrangement of modules that makes up a QR code's visible pattern — the structure a scanner reads row by row and column by column to reconstruct the encoded data.
The grid isn't random noise; every module's position is meaningful, encoding either actual data, error-correction information, or fixed structural elements like the finder patterns and timing patterns (thin alternating lines that help the scanner calibrate module spacing). This is why even a small amount of visual damage to the grid can still be recovered — error correction rebuilds missing pieces from the surrounding structure.
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