Returns the check digit for all GS1 Keys requiring a Modulo 10 check digit, i.e.
- Global Trade Item Number (GTIN) in all applicable formats, i.e. GTIN-8, GTIN-12, GTIN-13, GTIN-14
- Global Trade Item Number (GLN)
- Serial Shipping Container Code (SSCC)
- Global Shipment Identification Number (GSIN)
- Global Service Relationship Number (GSRN)
Returns null if input (GS1 key without check digit) is invalid.
An interactive demo is available at https://gs1-germany.github.io/checkDigitCalculator/
For details, see GS1 GenSpecs, section 7.9.1: Standard check digit calculations for GS1 data structures.
Copyright 2021-2023 | Ralph Tröger ralph.troeger@gs1.de and Mattias Horn ollah666@gmail.com
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