Free Online
Barcode Scanner

Try out Cognex's easy-to-use online barcode scanning tool.

Designed for both new and experienced users, the tool provides instant, accurate barcode readings directly from your browser.


Features of the Free Barcode Scanner

  1. Auto-Detection: Not sure about the type of barcode? The tool automatically detects the code type and reads it for you.
  2. Image Upload: Easily upload your barcode images for scanning. For the best results, use images with a clean, white background.
  3. High-Accuracy Readings: Our advanced algorithm ensures high-accuracy readings and interprets even the most complex barcodes, minimizing errors and providing consistently reliable results.

Beyond the Tool: Cognex's Barcode Reader Product Portfolio

While this online tool offers convenience, Cognex barcode readers provide even greater functionality and versatility:

Get Started Now

Ready to increase traceability across your facility? Check out our barcode scanners and readers and see how Cognex can help you improve read rates, optimize throughput, and reduce costs.

1 Select barcode type(s)


Choose Barcode Type

Aztec Code


Code 11

Code 25

Code 39

Code 93

Code 128

Data Matrix



GS1 DataBar


MSI Plessey


Postal Barcodes


QR Code

2 SDK Effort Level

3 Select an Image File

Best Practices

  1. Try to use images that are on a clear white background.
  2. If the symbology (barcode type) within the image is known, select it in Step 1. ONLY if the symbology is unknown, use autodetect (NOTE: AUTODETECT is inefficient and imperfect codes may not be found).

About Image Decoding

Reading a barcode from a single image has its limitations--some barcodes may not be found because of pixel alignment, perspective, skew, illumination, or compression artifacts from formats like JPEG. Performance of this online barcode reader is not representative of the performance of our world class, rugged barcode readers. Learn more at

Get Started