jsQR R
A pure JavaScript library for reading QR codes from raw image data in browsers and Node.js.
What is jsQR R?
jsQR is a pure JavaScript library that decodes QR codes from raw image data. It takes RGBA pixel arrays, locates QR codes within images, extracts them, and parses their content without requiring external dependencies. It solves the problem of adding QR code scanning functionality to web applications, Node.js backends, or browser extensions without relying on native APIs or plugins.
JavaScript developers needing QR code reading capabilities in web apps (e.g., for webcam scanning or file uploads) or Node.js services processing images. It's also suitable for library authors who want to embed QR decoding without heavy dependencies.
Developers choose jsQR because it's lightweight, dependency-free, and works identically across browsers and Node.js. Its pure JavaScript implementation ensures consistent behavior, and its detailed output (including QR code location points) provides flexibility for advanced use cases beyond basic decoding.
Overview
A pure javascript QR code reading library. This library takes in raw images and will locate, extract and parse any QR code found within.
Use Cases
Best For
- Adding QR code scanning to web applications using webcam streams
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