About
QRFerry transfers a file between two devices entirely in-browser by streaming it as an animated sequence of QR codes, using RaptorQ fountain coding, Brotli/gzip compression, and WebAssembly-based QR rendering (fast_qr) and scanning (ZXing-C++) to survive dropped or blurred frames. It supports single and dual-lane 'Turbo' modes for higher throughput and verifies data integrity with layered CRC checks before saving, avoiding any server upload of the file.
Why it made the leaderboard
If you need to move a file onto or off a machine with no network, no USB, and no cloud, QRFerry does it screen-to-camera in the browser using RaptorQ fountain coding, so the receiver can start scanning mid-stream and still rebuild the file from out-of-order or missed frames — with CRC-32 verification and no server ever touching the data.
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