How to Create an Online QR Code Reader

To acquire image from scanner/webcam and read QR barcodes online in a web page

QR code applications have been widely used in document management for document indexing, separation etc. Creating an online QR code reader application involves capturing barcode images, decode the barcode content, and accomplishing corresponding workflows. The barcode images can come from scanned documents, webcam captures or existing image files. Writing all the code for interacting with peripherals, such as scanners and webcams, and for QR code recognition is an ambiguous task. It will cost much time and effort. In this post, we will instead use Dynamsoft Barcode Reader SDK to dramatically cut down on the cost and work.

Dynamsoft Barcode Reader is a barcode scanning SDK which enables you to efficiently embed barcode reading functionality into our web, desktop and mobile application using just a few lines of code. The JavaScript barcode API supports all mainstream browsers on Windows.

Online Barcode & QR Code Reader Demo

You can try out the online demo application of Dynamsoft Barcode Reader. The online demo will let you capture an image and read 1D and QR barcodes online.

Try Barcode Reader JS Online Demo >

Let’s move forward and see how to embed the code for a QR Code scanner in your web application.

Acquire a Barcode Image from Scanner, Webcam or Local Disk

You can read barcodes from document scanners, web cameras and also from existing image files by combining Dynamsoft’s imaging SDKs.

To scan documents that have a barcode from scanners

You can use Dynamsoft Web TWAIN along with Dynamsoft Barcode Reader for reading barcodes from scanners.

read barcode from document scanner

To capture a barcode image from a webcam

You can use Dynamsoft Camera SDK along with Dynamsoft Barcode Reader for reading barcodes from webcams.
read barcode from webcam
To load a barcode image from local disk

You can also read barcodes from image files.

read qr code online

Get Sample Code and Free Trial

The complete source code of this sample can be got here.

If you are interested in easily embedding image capture and QR code reading in your web application using Dynamsoft Barcode Reader, you can download the 30-day free trial.

Get 30-day free trial

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