Help us reproduce a problem
Include the tool page, barcode format, device, browser and version, the action you took, and what happened. Use an invented example value rather than customer details, private inventory data or Wi-Fi passwords.
If the problem only appears on paper, include the printer type, label size and whether SVG or PNG was used. A photograph can help, provided it does not expose private information.
Questions about product numbers
For number allocation or registry ownership, contact your local GS1 organisation. For marketplace acceptance, use that platform’s current requirements. We can help clarify the tool’s behavior but cannot approve a GTIN or certify a printed label.
Last reviewed: · How we maintain these tools