GS1-128 barcode generator and verifier for food production
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Verify / Decode
Data
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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
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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
Zebra ZT420
Printer DPI
203 dpi (standard)
300 dpi (high-res)
ZT420 supports 203 and 300 dpi heads
Bar width (dots)
1 dot = 1÷DPI inch at print
Bar height (px)
Label size
147×209 mm (your stock)
101×152 mm (4″×6″ — shipping)
152×102 mm (6″×4″ — landscape)
101×101 mm (4″×4″ — square)
102×51 mm (4″×2″ — small)
148×210 mm (A5)
Custom
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)
ZT420 · Max print width 168 mm · 203 or 300 dpi · 12 ips · CODE128 / GS1-128 ✓
Generate barcodes
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Print labels
Verify label
Copy data strings
Fill in fields and click Generate
GS1-128 data string
Accepts
(AI)value
notation, raw FNC1-separated strings, or plain concatenated data.
Decode & verify
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