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GS1-128 (formerly known as UCC/EAN-128) is a subset of Code 128 and is used extensively worldwide in shipping and packaging industries as a product identification code for the container and pallet levels in the supply chain.

It allows for the inclusion of various types of data in a structured format, ensuring interoperability across different industries. Here's a detailed overview of the GS1-128 barcode:

Structure and Format

1.Code Set:

GS1-128 utilizes the Code 128 symbology, which includes three character sets (A, B, and C). Each set supports different characters and data formats, allowing efficient encoding of a wide range of data.

2.Application Identifiers (AIs):

The key feature of GS1-128 is the use of Application Identifiers (AIs). AIs are prefixes that define the meaning and format of the data that follows. For example:

(01) - Global Trade Item Number (GTIN)

(10) - Batch or Lot Number

(17) - Expiration Date

(21) - Serial Number

AIs ensure that the encoded data is interpreted correctly across different systems and applications.

3.Data Structure:

The barcode data starts with a Function Code 1 (FNC1) character, which indicates the start of a GS1-128 barcode.

Following the FNC1, the barcode includes one or more data fields, each prefixed by an AI. Each field consists of an AI and the corresponding data.

Encoding Process

1.Start Character:

The encoding begins with the Start character, which is one of the three Code 128 start codes (A, B, or C).

2.FNC1 Character:

After the start character, the FNC1 character is encoded to signify the beginning of a GS1-128 barcode.

3.Application Identifiers and Data:

Each data element is prefixed with its corresponding AI, which can be of variable length. The data is encoded according to the rules defined by the AI.

4.Check Digit:

A mandatory check digit is calculated for the entire barcode data (excluding the start character and the FNC1). This check digit ensures data integrity during scanning.

5.Stop Character:

The barcode ends with a stop character, signifying the end of the barcode data.

Example

Suppose you want to encode a GTIN, a batch number, and an expiration date:

GTIN: 12345678901234

Batch Number: ABC123

Expiration Date: 2024-12-31

The AIs for these data elements are:

GTIN: (01)

Batch Number: (10)

Expiration Date: (17)

The barcode data string would be:

(Start) (FNC1) 0112345678901234 101234 17241231 (Check Digit) (Stop)

Key Characteristics

1.High Data Density:

GS1-128 can encode large amounts of data in a compact format, making it ideal for detailed product information.

2.Versatility:

Supports a wide range of data types, including numeric, alphanumeric, and date formats.

3.Global Standardization:

Widely recognized and used in international supply chains, ensuring consistency and compatibility.

4.Error Detection:

The inclusion of a check digit enhances data accuracy and reduces the risk of misreads.

Applications

1.Logistics and Transportation:

Used for tracking shipments, pallets, and containers with detailed product information.

2.Healthcare:

Helps in tracking medical devices, pharmaceuticals, and patient information.

3.Retail:

Facilitates inventory management, product identification, and point-of-sale scanning.

4.Manufacturing:

Used for tracking parts, components, and finished goods throughout the production process.

The GS1-128 barcode is a powerful tool for managing and exchanging detailed product information in a standardized and efficient manner, significantly improving traceability and operational efficiency across various industries.

EasierSoft Barcode Label Design & Bulk Printing Software

---- Use Excel Data to Batch Print Barcodes on Label Sheets or Roll Labels  

---- How to use this barcode software

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Once you obtain a GS1/UPC/EAN barcode, or other barcode type and QR code, you can use our free software to batch print barcode labels onto Roll label paper using a professional label printer, or to batch print barcodes onto Avery 5160 label sheets using a regular laser or inkjet printer. Our software has free and paid versions.

The free version fully meets your needs for batch printing GS1/UPC/EAN barcodes. The paid version can import data from Excel and databases to batch print barcode labels with different values.

How to Use & FAQ:

Highlights

Excel integration: Import data directly from Excel to generate and print barcodes in bulk.

Label designer: Create complex labels with multiple barcodes, text, logos, and shapes.

Batch printing: Print thousands of barcodes at once using standard inkjet/laser printers or professional barcode printers.

Flexible editions:

Standard Edition: Simple batch printing with Excel data.

Professional Edition: Adds command-line automation for workflow integration.

Label Designer Edition: Advanced design features for complex labels.

Why Choose Our Barcode Solutions?

Cost-effective: Free online generator and permanent free desktop version available.

Easy to use: No technical expertise required—just input data and print.

Versatile: Supports nearly all 1D and 2D barcode types, including QR codes.

Trusted: Recommended by CNET and widely downloaded by users worldwide.

Suitable Use Cases

Small businesses and startups needing quick barcode labels for products.

Retailers and online sellers managing inventory with batch barcode printing.

Manufacturers requiring sequential or custom barcode labels for packaging.

Educational and testing environments where barcodes are used for tracking.