Free ISBN Converter
Convert between ISBN-13 and ISBN-10 formats instantly with our free online tool. Perfect for authors, publishers, librarians, and booksellers who need to work with different ISBN formats for catalogs, databases, and inventory systems.
The tool automatically detects your ISBN format and converts it to the opposite format. Supports both single and batch conversion for efficient workflow.
Convert Your ISBN
Enter your ISBN-10 or ISBN-13 number below. The tool automatically detects the format and converts accordingly. Note that only ISBN-13 with prefix 978 can be converted to ISBN-10.
Why Use Our ISBN Converter?
100% Free
No registration or payment required
Automatic Detection
Detects ISBN format automatically
Batch Conversion
Convert multiple ISBNs at once
Instant Results
Get converted ISBNs immediately
Understanding ISBN Formats
The ISBN-13 replaced the ISBN-10 as the standard in 2007. The ISBN-13 format is 13 digits long, while the ISBN-10 format is 10 digits long. ISBN-13 numbers begin with a 978 or 979 prefix, which identifies them as book identifiers from the EAN.UCC numbering system.
This converter tool helps you switch between these formats seamlessly. It's particularly useful for managing book catalogs, updating databases, or working with systems that require specific ISBN formats.
Frequently Asked Questions About ISBN Conversion
What is the difference between ISBN-10 and ISBN-13?
ISBN-10 is the older 10-digit format used before 2007, while ISBN-13 is the current 13-digit standard. ISBN-13 includes a 978 or 979 prefix and is compatible with the global EAN barcode system. All new ISBNs are issued in ISBN-13 format.
Can all ISBN-13 numbers be converted to ISBN-10?
No, only ISBN-13 numbers that start with the 978 prefix can be converted to ISBN-10. ISBN-13 numbers with the 979 prefix cannot be converted because they were introduced after the ISBN-10 system was phased out.
Why would I need to convert between ISBN formats?
You might need to convert between formats for compatibility with older systems, databases, or catalogs that still use ISBN-10. Some retailers and libraries may require both formats for their records, especially for books published before 2007.
Is the ISBN converter tool free to use?
Yes, our ISBN converter tool is completely free to use with no registration required. You can convert single ISBNs or batch convert multiple ISBNs at once.
Does the converter validate ISBNs?
The converter performs basic format checking but is primarily designed for conversion. For comprehensive ISBN validation, including check digit verification, use our dedicated ISBN Validator tool.
Can I convert multiple ISBNs at once?
Yes, use the 'Multiple ISBNs' tab to convert multiple ISBN numbers in bulk. Simply enter one ISBN per line, and the tool will convert all of them at once. You can then copy all results with a single click.
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