Open Source Licenses

The Offline Barcode Reader PWA is built on the following open source software. All barcode decoding runs entirely on your device; no component transmits your images to a server.

ZBar Bar Code Reader

github.com/mchehab/zbar

mchehab (and contributors)

The C/C++ barcode scanning engine, compiled to WebAssembly and used as the primary 1D / QR decoder.

License:GNU LGPL-2.1-or-later

@undecaf/zbar-wasm

github.com/undecaf/zbar-wasm

F. Kasper (undecaf)

WebAssembly build of ZBar plus TypeScript glue; provides scanImageData().

License:GNU LGPL-2.1-or-later

ZXing ("zebra crossing")

github.com/zxing-js/library

The ZXing authors

Pure-JavaScript multi-format decoder, used for Aztec / PDF417 and as a fallback.

License:Apache License 2.0

jsQR

github.com/cozmo/jsQR

cosmositional

Fast standalone QR code decoder.

License:Apache License 2.0

@ericblade/quagga2

github.com/ericblade/quagga2

Eric Blade (and QuaggaJS contributors)

1D barcode locator/decoder used as an additional fallback.

License:MIT

cropperjs

github.com/fengyuanchen/cropperjs

Chen Fengyuan

Image cropping UI for the upload / crop scan mode.

License:MIT

Astro · SolidJS · Tailwind CSS

astro.build

The Astro Labs, Solid.js, and Tailwind Labs teams

Site framework, reactive UI runtime, and styling.

License:MIT

Full license texts

This notice is provided to comply with the attribution requirements of the GNU Lesser General Public License (LGPL-2.1+), under which the ZBar barcode engine and its WebAssembly build are distributed.