productivity 5 min read· 2025-02-10
How QR Codes Work: The Technology Behind Quick Response Codes
An in-depth explanation of QR code architecture, error correction levels, and data encoding types.
Quick Response (QR) codes have revolutionized how physical and digital worlds connect.
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The Anatomy of a QR Code
Finder Patterns: The three large squares in corners allow scanners to orient the code.
Timing Patterns: Alternating black and white modules that define coordinate grids.
Error Correction: Reed-Solomon codes that enable scanning even if up to 30% of the code is damaged.
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