To test if your barcode is working correctly, you can use a barcode scanner or a smartphone app that can read barcodes. Follow these steps to test your barcode: Download a barcode scanning app or use a barcode scanner device. Scan the barcode on your product using the scanner or the app. Verify that the information associated with the barcode, such as the product name and other details, matches the product you are testing. Verify that the scanner or the app can read the barcode accurately and quickly.