Barcode Generator

Code 128 is the most flexible common barcode: the standard covers all 128 ASCII characters, and this tool accepts the full printable range, letters, digits, punctuation and spaces, using three internal subsets (A, B and C) that the encoder switches between automatically to keep the code as short as possible. That makes it the default choice for SKUs, serial numbers, coupons and logistics labels where the content is not a fixed retail product number.

EAN-13 and UPC-A are retail product codes: fixed-length numbers issued through GS1 that supermarket scanners are built to expect. ITF-14 wraps a product's GTIN for cartons and cases, so a warehouse can scan a whole box without opening it.

Code 39 is an older format that only encodes uppercase letters, digits and a handful of symbols, and needs roughly twice the width of Code 128 for the same content. It survives in some legacy inventory systems and asset tags, but there is rarely a reason to choose it for something new.

Paste or type as many values as you need, one per line. Each non-empty line is validated and rendered as its own barcode using the format, size and text settings you choose, so a single batch can cover an entire product list or a run of serial numbers.

If a line does not fit the chosen format, whether the length is wrong, it contains a character the format cannot encode, or a check digit does not match, that line shows its own error and the rest of the batch keeps generating. You can fix the flagged lines and regenerate without redoing the whole list.

Download a single code with its own PNG or SVG button, or use the download-all options to get every code in the batch as a PNG zip or an SVG zip in one go, each file named after the value it encodes.

EAN-13, EAN-8, UPC-A and ITF-14 all end in a check digit computed with the same GS1 mod-10 formula: starting from the rightmost digit, alternate digits are multiplied by 3 and 1, the results are summed, and the check digit is the amount needed to round that sum up to the next multiple of ten. It exists so a scanner can catch a single mistyped or misread digit before it reaches a till or a database.

This tool accepts either length for the GTIN formats. Enter the body without a check digit, for example 12 digits for EAN-13, and it computes and appends the correct one. Enter the full length instead, and it verifies the check digit you supplied and flags a mismatch rather than silently accepting a bad code.