QR and barcode scanner using HTML and Javascript

5 min readJun 14, 2021
Different type of 1D and 2D code formats like QR code, AZTEC, PDF_417

The little QR code scanning library I have been maintaining since 2015 has been getting more attention recently. And with power came responsibilities, bugs, and feature requests. Some of the key features requested by developers were more reliable scanning and the ability to scan different types of bar codes. With version 2.0.0 onwards developers can scan different types of 1D codes (bar codes) and 2D…


Senior Software Engineer @Google. Leading teams democratising On device AI for for masses. Writes about programming generics & specifics.