Codabar barcode generator
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About Codabar
Codabar (Rationalized) is a self-checking numeric barcode widely used in libraries, blood banks, and FedEx air-bill applications. It supports digits, six special characters, and four start/stop symbols.
Valid input
- Digits 0-9 and the symbols - $ : / . + are encodable.
- Start and stop characters are A, B, C, or D - scanners may be configured to expect a specific pair.
- No mandatory checksum, but some applications (libraries, blood banks) require a specific mod-16 or mod-10 scheme.
Related barcode types
Guides
- How to Print Barcode Labels That Actually Scan
DPI, X-dimension, quiet zone, and the handful of print settings that decide whether your label works. A practical guide for anyone printing labels at real volume.
- Why Won't My Barcode Scan? A 7-Step Checklist
A checklist for diagnosing barcode scan failures, covering quiet zones, contrast, print resolution, physical damage, wrong symbology, check digits, and scanner distance.