ISBN Validator
Validate International Standard Book Numbers (ISBN-10 & ISBN-13) quickly and accurately.
How to Use ISBN Validator
- Enter one or more ISBNs (ISBN-10 or ISBN-13) in the text area.
- Click Validate to check if they are valid.
- Results will show format type and validity status.
- Copy or download the results for later use.
💡 Note: This validator checks only the checksum validity of ISBNs, not whether the book actually exists.
Where to Find the ISBN on a Book
Understanding ISBN Structure
An ISBN-13 consists of five parts, each with a specific meaning:
Prefix3
Registration Group16
Registrant (Publisher)148410
Publication0
Check Digit
Example: 978-3-16-148410-0• 978: Bookland prefix • 3: German-speaking countries • 16: Specific publisher • 148410: Unique title/edition • 0: Check digit
What is an ISBN Validator?
An ISBN (International Standard Book Number) Validator is a tool that verifies whether an ISBN is valid. It uses a checksum formula to confirm the integrity of the number, ensuring it hasn't been corrupted or entered incorrectly. This tool can validate both the older 10-digit format (ISBN-10) and the current 13-digit format (ISBN-13).
Why Use Our ISBN Validator?
- For Authors and Publishers: Ensure the ISBNs assigned to your books are correct before printing.
- For Libraries and Booksellers: Quickly verify ISBNs for cataloging and inventory management.
- For Students and Researchers: Confirm the accuracy of ISBNs when citing sources.
- Bulk Validation: Check a list of ISBNs at once, saving time and effort.
🚀 Explore More Free Developer Tools
Don’t stop here! Supercharge your workflow with our other powerful converters & formatters.
✅ Card Validator
Validate card numbers
🔧 UUID Generator
Generate universally unique identifiers (UUIDs)
🚀 Regex Tester
Test regular expressions against strings
💡 New tools are added regularly — bookmark DevUtilsX and stay ahead!
Want to support my work?
Buy me a coffee