The app will not only decode the data content but also list the barcode symbology. In this screenshot, the free CoScan app for iPhone detects and identifies a Code 128 on a product package: A good CCD scanner or reader app will also be able to scan the codeįor more sample 128 barcodes and a general introduction to Code 128, see our page Code 128 explained.Ī scanner app is the easiest and fastest way to verify a printed Code 128 barcode. Right-click and "Save as." to print the barcode out. The proper checksum, and sufficient quality. It encodes nine characters, has the required start/stop symbols, Use the following verified sample barcode to test the settings of your scanner. It is also not clear if the font includes the required FNC1 character that is needed to encode Code 128 GS1. Usually a macro, add-in, or stand-alone app will be supplied with the font that converts your data for the font and calculates a check digit.Īccordingly, the "Libre" barcode font for Code 128 also requires a separate encoder to create a valid barcode symbol with start/stop characters and check digit as such it is not practical to use the "Libre" font in Excel. Instead, you will have to format your data by adding start and stop symbols and a check digit. When using a Code 128 barcode font in office applications like Word or Excel, you can't just simply select your numbers and change the font. Using a Code 128 barcode font in Excel, Google Sheets It without a checksum, a common mistake when using a Code 128 barcode font, see below. If the code does not scan you may have created With Code 128 almost all barcode readers on the market today will will expect a checksum with the barcode.
If so, a barcode with only three characters will not scan. By default, many scanners require a barcode to encode at least four characters.
A space (the so called "quiet zone") of at least five to ten millimeters should be left around the code. the width of the narrowest bar) should not beīelow 0.3 mm. Sure that the code is not printed too small. For Code 128, a resolution of 150-200dpi or higher is recommended.
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