Code 128 for warehouse and shipping labels
Warehouse and shipping labels are usually printed onto a template with a fixed field for the barcode, so the operational need here is a predictable, known bar height rather than whatever height bwip-js would auto-compute for a one-off code.
Preconfigured for logistics labels
This experience sets the bwip-js height option to 20mm ("height": 20), giving the bars a known rendered height instead of leaving that option at the encoder default.
Example data
The generator is seeded with "Count11234567!", a bwip-js-verified example distinct from the primary's "Count01234567!"; replace it with your own item, asset, or tracking code.
Workflow
Enter the item/asset identifier, confirm the human-readable text matches, then export SVG for label printers or PNG for quick previews.
Job-specific settings
Enable includetext for warehouse staff who need to read the code by eye, and set height to match your label template.
Scanning notes
Keep quiet zones intact and avoid stretching the barcode disproportionately, since bar-width ratios matter for decode reliability.
Common mistakes
Manually inserting a check digit is unnecessary and will double-encode it -- let the encoder compute the checksum.
Standard
Code 128 is defined by ISO/IEC 15417.
Related
For GS1 application-identifier logistics labels (GTIN, lot, SSCC), use the GS1-128 generator instead.
FAQ
Why fix the height instead of using the default?
Most label templates have a fixed field height for the barcode; a fixed 20mm value lets you design the rest of the label layout around a known size instead of measuring bwip-js's own auto-computed output first.