GS1-128 Generator & Verifier

Data

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GS1 company prefix

SSCC uses extension + company prefix + serial (16 digits) + check digit. Longer prefix → fewer serial digits.

Logistics

SSCC

Labels to generate

Each gets a unique SSCC

Copies per label

Duplicate each label when printing

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Product identification

Saved item

Item description

Shown on the label above the barcodes (not encoded)

GTIN-14

14 digits — check digit validated

Batch / Lot

Up to 20 chars, GS1-82 charset

Dates

Prod. date

YYMMDD

Best before

YYMMDD

Use-by / Expiry

YYMMDD

Weight & count

Net weight kg

2 decimal places encoded (×10⁻²), max 9999.99 kg

Count

Max 8 digits

Printer & label settings

Printer DPI

ZT420 supports 203 and 300 dpi heads

Bar width (dots)

1 dot = 1÷DPI inch at print

Bar height (px)

Label size

Label width (mm)

ZT420: 51–168 mm

Label height (mm)

Label text size

Item title & field list above barcodes

Barcode text size

Human-readable text under barcodes

Human-readable text (HRI) Include SSCC on label

ZT420 · Max print width 168 mm · 203 or 300 dpi · 12 ips · CODE128 / GS1-128 ✓

Fill in fields and click Generate

Scan from photo

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GS1-128 data string

Accepts (AI)value notation, raw FNC1-separated strings, or plain concatenated data.

GS1-128 barcode generator and verifier for food production