Random ISBN-10 Generator
ISBN-10 fixture generated locally in your browser with the Web Crypto API.
Legacy book identifier fixtures
Generate valid-looking 10-character ISBN-10 values with a correct mod-11 check digit for legacy library catalog, bookstore, CMS, import pipeline, API, and seed data tests. The check digit may legitimately be the letter X.
These are random fixture identifiers, not assigned real book records, titles, authors, or publisher registrations.