Code 128 generator
This page explains what a Code 128 is used for, what the encoded text looks like, and how to make one. The generator runs entirely on your device.
How to make a Code 128
Three steps:
- Open the generator and pick Code 128.
- Fill in the fields — the preview updates as you type.
- Download PNG for screens, or SVG for anything going to print.
Example
Scanners recognise this content by its prefix, so the text has to be formatted exactly. The generator handles the escaping — a Wi-Fi password containing a semicolon, for instance, breaks a hand-written payload.
SHIP-00123456Technical details
- Character set
- All 128 ASCII characters
- Length
- Any length
- Check digit
- Modulo 103, added automatically
Practical tips
- Print on white and keep the bars black. Scanners read reflectance, not colour.
- Do not stretch the barcode horizontally — the bar widths carry the data. Change the bar width setting instead.
- Leave clear space either side of the bars, at least ten times the narrow bar width.