Free ISBN-13 Generator

Generate valid ISBN-13 numbers instantly for testing and development purposes. Our free online ISBN generator creates structurally valid ISBNs with proper check digit calculation, perfect for developers building book management systems or testing applications.

Create single or bulk ISBN-13 numbers with 978 or 979 prefixes. All generated ISBNs pass standard validation checks.

Important: Generated ISBNs are for testing and development purposes only. Do not use these ISBNs for actual publications. For real books, obtain official ISBNs from authorized agencies.

Generate ISBN-13 Numbers

Select how many ISBN-13 numbers you need (up to 100) and click generate. Each ISBN will have a valid check digit and proper formatting.

ISBN-13 number generator for testing and development

Why Use Our ISBN-13 Generator?

100% Free

Generate unlimited ISBNs at no cost

Valid Check Digits

All ISBNs pass standard validation checks

Bulk Generation

Create up to 100 ISBNs at once

Instant Results

Generate and copy ISBNs immediately

Frequently Asked Questions About ISBN-13 Generation

What is an ISBN-13 number?

An ISBN-13 (International Standard Book Number) is a unique 13-digit identifier for books and book-like products. It consists of five parts: a prefix element (978 or 979), registration group, registrant, publication, and a check digit for validation.

Can I use generated ISBNs for my published books?

No, generated ISBNs from this tool are for testing and development purposes only. For actual publications, you must obtain official ISBNs from authorized ISBN agencies or resellers. Using unregistered ISBNs for published books is not permitted.

How does the ISBN check digit work?

The ISBN-13 check digit is calculated using a modulo 10 algorithm with alternating weights of 1 and 3. The sum of all 12 digits (each multiplied by its weight) is calculated, and the check digit is the number that makes the total sum divisible by 10.

What are ISBN prefixes 978 and 979?

The 978 and 979 prefixes are the Bookland EAN prefixes designated for ISBNs. The 978 prefix was the original ISBN prefix, while 979 was added to accommodate the growing number of publications worldwide. Both are valid for ISBN-13 numbers.

How many ISBNs can I generate at once?

Our tool allows you to generate up to 100 ISBN-13 numbers at once. This bulk generation feature is useful for developers testing book management systems or creating sample datasets for development purposes.

Where can I get official ISBNs for my books?

Official ISBNs can be obtained from your national ISBN agency or through authorized resellers. In the United States, Bowker is the official ISBN agency. Many self-publishing platforms also provide ISBNs as part of their publishing packages.

Are the generated ISBNs valid?

Yes, the generated ISBNs are structurally valid and will pass standard ISBN validation checks, including proper check digit calculation. However, they are not registered with any ISBN agency and should only be used for testing purposes.

What is the difference between ISBN-10 and ISBN-13?

ISBN-10 is the older 10-digit format that was used until 2007. ISBN-13 is the current 13-digit format that has been mandatory since 2007. ISBN-13 provides more capacity for unique identifiers and is compatible with the global EAN barcode system.

About ISBN-13 Generation

This tool generates random ISBN-13 numbers that pass the standard ISBN validation checks. The generated ISBNs follow the proper format and include valid check digits, but they are not registered with any ISBN agency.

Important Notes:

Generated ISBNs are for testing and development purposes only
These ISBNs are not registered and should not be used for actual publications
For real publications, obtain ISBNs from official ISBN agencies or authorized resellers
All generated ISBNs include valid check digits
ISBNs start with either 978 or 979 prefix
Perfect for developers building book management systems
Useful for creating test data and sample datasets