Barcode Generator
Generate Code 128 barcodes for your products
About the Code 128 Barcode Generator
This Code 128 barcode generator encodes any alphanumeric value as a Code 128 barcode and outputs a print-ready PNG. Code 128 is the format used for internal labelling, shipping and inventory rather than retail products.
A Code 128 barcode generator covers the internal-labelling case. Code 128 encodes the full ASCII set at high density and has no fixed length, which is why it dominates shipping labels, warehouse locations, asset tags and internal part numbers.
It is deliberately not a retail format. EAN-13 and UPC identify products for sale and require a registered company prefix; Code 128 encodes whatever value your own system uses, with no registration and no central authority involved.
For scanning reliability, print at a decent size and keep quiet zones — the blank margins either side — clear. Most failed scans come from a barcode printed too small, too close to other elements, or scaled non-proportionally so the bar widths no longer match the specification.
How to use the Code 128 Barcode Generator
- Enter your value. Type the alphanumeric code to encode.
- Generate the barcode. The Code 128 pattern is rendered.
- Check the quiet zones. Leave clear margins either side so scanners can read it.
- Download the PNG. Save the image and print it at a readable size.
Code 128 Barcode Generator features
- Code 128 encoding for the full ASCII set
- Variable length input
- Print-ready PNG download
- Quiet zones included in the output
- No registration or company prefix needed
- Runs entirely in your browser
Frequently asked questions
What is Code 128 used for?
Internal labelling — shipping labels, warehouse locations, asset tags and part numbers. It encodes the full ASCII set at any length.
Can I use it for retail products?
No. Retail needs EAN-13 or UPC, which require a registered company prefix. Code 128 encodes your own internal values.
Why does my barcode fail to scan?
Usually it was printed too small, scaled non-proportionally, or has no clear margin around it. Quiet zones matter.
What characters can it encode?
The full ASCII set, including letters, digits and symbols, with no fixed length limit.
Is the output print-ready?
Yes. The PNG includes quiet zones and can be printed directly onto a label.