Free Codabar barcode generator
Create Codabar (NW-7 / USD-4) barcodes for library books, blood banks (ISBT), photo labs, and logistics.
Reliable Codabar (NW-7) barcodes for libraries, medical labs & shipping
Codabar (also known as NW-7, Monarch, or Code 2 of 7) is a discrete, self-checking symbology widely used by public and university libraries, US blood banks, medical laboratories, and parcel delivery forms. It encodes digits 0–9 plus six special characters (- $ : / . +) flanked by start/stop symbols A, B, C, or D.
Supports A–D Start/Stop Guard Letters
Use A, B, C, or D delimiters required by library circulation systems and blood bank scanners.
Self-Checking Discrete Bars
Highly tolerant of older dot-matrix, thermal, and impact printers.
100% Free & On-Device
Generate medical or library patron barcodes privately in your browser.
How to generate a Codabar barcode
- 1Enter your Codabar number
Type digits and allowed symbols (- $ : / . +) with optional A, B, C, or D start/stop letters (e.g., A1234567890B).
- 2Customize dimensions
Adjust bar width, height, and font size to match your library or specimen label stock.
- 3Download PNG or SVG
Export your Codabar barcode in PNG or scalable SVG format.
Frequently asked questions
What if I don't type A, B, C, or D at the start and end of my Codabar number?
If you enter digits only, default start/stop guard bars are applied automatically so the barcode scans properly.
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