ISBN Validator
Validate ISBN-10 and ISBN-13 identifiers with check digit verification and batch line-by-line reports.
ISBN-10 and ISBN-13 validation
International Standard Book Numbers include a check digit so scanners and catalogs can catch transcription errors.
This tool verifies both ISBN-10 (including trailing X) and ISBN-13 (GS1) forms in batch.
For retail product codes, see the EAN Validator. To validate mobile device identifiers, use the IMEI Validator.
Frequently Asked Questions
Are hyphens required?
No. Hyphens and spaces are stripped before the check digit is evaluated.
Does validation prove the book exists?
No. A valid check digit only means the number is structurally correct, not that it is assigned to a title.
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