Validate an ISSN (serial publication identifier) checksum.
What this tool does
Pure GS1 mod-11 check over the 8 ISSN digits (last one may be 'X'). Accepts hyphens/spaces. No network, no credentials.
Input data
| Parameter | Required | Example | Description |
|---|---|---|---|
issn | Yes | 0378-5955 | ISSN to validate. |
Output data
| Field | Description |
|---|---|
result | Whether the checksum is valid. |