ISBN Converter
Convert ISBN-10 to ISBN-13 and validate checksums. Enter one ISBN per line — batch-process up to 50 at once.
About ISBN Formats
ISBN-10
The older 10-digit format used before 2007. The last digit is a check digit that can be 0-9 or X (representing 10).
Example: 0-451-52653-8
ISBN-13
The current 13-digit standard, compatible with the EAN barcode system. All new ISBNs are ISBN-13. Starts with 978 or 979.
Example: 978-0-451-52653-7
Managing ISBNs across your catalogue?
Pubblish tracks ISBNs for every edition — with automatic validation, duplicate detection, and barcode generation built in.
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