Business Tools

GS1 Barcode Generator & Application Identifier Builder

Create GS1-128 and GS1 DataMatrix symbols from structured fields such as GTIN, batch, serial, expiry and SSCC. Validation and check digits are handled in your browser.

GS1 barcode tools

GS1-128

Build a GS1-128 barcode from structured fields — GTIN, batch, expiry, serial — or switch to raw Application Identifier mode.

GS1 DataMatrix

GS1 DataMatrix packs Application Identifier data into a small 2D square, widely used for healthcare and direct part marking.

SSCC

SSCC identifies a logistics unit — a pallet or shipping container — with an 18-digit serial code.

ITF-14

ITF-14 encodes a 14-digit GTIN on outer cartons and cases. Check digit validation and bearer bars are handled for you.

GS1 logistics labels

Print SSCC, GTIN and batch data on Avery sheets or 4×6 thermal labels for warehouse and shipping use.

Common GS1 Application Identifiers

  • (01) GTIN — 14-digit trade item identifier
  • (10) Batch / Lot — variable length alphanumeric
  • (11) Production date — YYMMDD
  • (15) Best before date — YYMMDD
  • (17) Expiration date — YYMMDD
  • (21) Serial number — variable length alphanumeric
  • (30) Variable count
  • (37) Count of trade items
  • (00) SSCC — 18-digit logistics unit

GS1 encoding notes

  • GS1-128 is Code 128 with a leading FNC1 character marking the data as GS1 element strings.
  • GS1 DataMatrix adds the same FNC1 marker in a compact 2D square.
  • Fixed-length AIs need no separator; variable-length AIs use FNC1 when another AI follows.
  • Dates use YYMMDD format. A day value of 00 means the last day of the month.

Frequently asked questions

What is a GS1 Application Identifier?
An Application Identifier (AI) is a two- to four-digit prefix that defines what the following data means — for example (01) for GTIN, (10) for batch/lot, (17) for expiry date and (00) for SSCC.
Does this tool issue official GTINs or SSCCs?
No. This tool encodes identifiers you already own into a scannable GS1 barcode. Official GS1 company prefixes, GTINs and SSCC ranges are assigned by GS1 member organisations.
Should I use GS1-128 or GS1 DataMatrix?
GS1-128 is a linear barcode ideal for pallets, cases and shipping labels. GS1 DataMatrix is a compact 2D code used for small items, healthcare devices and direct part marking.