I built a QR code phishing scanner for our free API — and ended up writing a PNG decoder from scratch to make it work.translating…

** ** The problem QR code phishing ("quishing") is one of the fastest-growing phishing vectors right now — Microsoft's 2026 report puts the year-over-year growth at 146% in Q1 alone, and QR codes now account for roughly 12% of all phishing attacks, up from under 1% in 2021…

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