ISBN Validator
Validate ISBN-10 and Bookland-prefixed ISBN-13 identifiers after removing spaces and hyphens, reject the 979-0 ISMN range, and convert valid 978-prefixed identifiers between formats.
Description
Validate ISBN-10 and Bookland-prefixed ISBN-13 identifiers after removing spaces and hyphens, reject the 979-0 ISMN range, and convert valid 978-prefixed identifiers between formats.
ISBN Validator handles the structural form and check-digit rules of the named identifier. Validate ISBN-10 and Bookland-prefixed ISBN-13 identifiers after removing spaces and hyphens, reject the 979-0 ISMN range, and convert valid 978-prefixed identifiers between formats.1
When to use ISBN Validator
Use it to catch typing, length, prefix, or check-digit errors before storing, importing, or displaying an identifier.
How ISBN Validator works
Validate ISBN-10 and Bookland-prefixed ISBN-13 identifiers after removing spaces and hyphens, reject the 979-0 ISMN range, and convert valid 978-prefixed identifiers between formats.1
How the identifier is processed
- Normalize permitted spaces and hyphens while retaining leading zeros.
- Check the exact length, character inventory, prefix rules, and variant-specific structure.
- Apply the standard check-digit or UPC zero-suppression rule and return the normalized result.
Limitations and assumptions
- A correct check digit proves only internal consistency; it does not prove that an agency assigned the identifier or that it belongs to a claimed product or publication.
- Leading zeros are significant and must not be removed by spreadsheet or numeric-field formatting.
- Registry ownership, company-prefix allocation, publication metadata, and barcode print quality require separate authoritative checks.
Alternative or Complementary approaches
Use the responsible ISBN, ISSN, ISMN, or GS1 registry to verify assignment and metadata. Use a barcode verifier when symbol dimensions, quiet zones, contrast, or scan reliability matter.
References
-
ISBN Users' Manual — International ISBN Agency
Similar or alternative tools
- GTIN Validator
Check structure and check-digit consistency.
- EAN-13 Generator
Calculate a related publication or product-code check digit.