Nhật Phúc — Custom QR Generator1.0.0
Application and original sample logo: MIT, copyright2026 Nhật Phúc (APPLICATION-MIT.txt).
node-qrcode1.5.4: MIT, Ryan Day and Kazuhiko Arase (QRCODE-MIT.txt). The pinned matrix API is used to preserve reserved QR function patterns. Rendering styles and embedded-logo SVG are application code.
jsQR1.4.0: Apache-2.0, Cosmo Wolfe/Jeff Nelson and contributors (JSQR-APACHE.txt). Used in a Worker to compare decoded bytes with the requested UTF-8 payload.
node-qrcode runtime dependency dijkstrajs: MIT (dijkstrajs-LICENSE.txt). pngjs license is included for package provenance; browser app uses its own SVG/Canvas renderer.
Vite8.3.8, Playwright1.65.0, Sharp0.35.5 and OpenCV are build/test only.
QR Code is a registered trademark of DENSO WAVE INCORPORATED. Quiet zone guidance: https://www.qrcode.com/en/howto/code.html
All encoding, raster logo normalization and scan checks happen locally in the browser. No remote URL/image lookup, tracking endpoint, dynamic QR redirect, CDN or external font. No payload or logo is persisted by the application.
A software decode check is not a guarantee for every phone, printing condition, background or distance; test the final image on intended devices.