Code 128 barcode generator, in bulk

The workhorse for inventory, shipping and asset tags. It takes letters, digits and punctuation, stays compact, and every warehouse scanner reads it.

1 Your data

One code per line, or paste rows straight from a spreadsheet

First row is a header

Encode

File names from

File name prefix

0 rows · 0 ready

2 Code type & look

Symbology

Code colour

Background

Transparent background

PNG width ≈ 600 px

Quiet zone: 10 modules (spec minimum 10)

Bar height: 15

Print digits under the bars

Caption under each code

3 Preview & export

First 0 of 0. Everything is generated in your browser.

Add some rows in step 1 and your labels appear here.

Download as

Remember my settings on this device ·

About Code 128

Code 128 packs pairs of digits into a single symbol character, so long numeric strings stay short. It also handles upper and lower case, spaces and symbols, which is why most internal labelling (SKUs, bin locations, serial numbers) uses it.

It has a built-in check character, so you never add one yourself. GS1-128 (the shipping-label variant with application identifiers such as (01) and (10)) is Code 128 with a special start character. This page makes plain Code 128.

Width grows with the data. If a code has to fit a small label, shorten the value or use a 2D code (Data Matrix or QR) instead.

Code 128 specification
Characters	All 128 ASCII characters
Length	Variable (keep it under ~25 for handheld scanning)
Used for	Inventory, SKUs, shipping labels, serial numbers
Quiet zone	10 modules each side
Check	Built-in mod-103 check character (invisible)
Density	Switches to compact digit-pair mode (Code C) automatically

Code 128 questions

Does Code 128 need a check digit?

No. A mod-103 check character is calculated and encoded automatically; it is not printed in the text line.

Code 128 or Code 39?

Code 128 is denser and supports lower case and all symbols. Use Code 39 only when an older system or a specification requires it.

Can I encode lower-case letters?

Yes. Code 128 covers all printable ASCII. Accented and non-Latin characters are not supported; use a QR code for those.