ISBN Converter
Convert between ISBN-13 and ISBN-10 formats. The tool automatically detects the format and converts accordingly. Note that only ISBN-13 with prefix 978 can be converted to ISBN-10.
About ISBN Conversion
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. Please note that ISBN-10 conversion from ISBN-13 is only possible for ISBN-13s that start with the prefix 978.

How to Use the ISBN Converter
- Enter your ISBN number(s) in the input field.
- Click the "Convert ISBN" button.
- The tool will automatically detect whether each ISBN is ISBN-10 or ISBN-13 and convert it to the other format.
- For bulk conversion, use the "Multiple ISBNs" tab and enter one ISBN per line.
- ISBN Converter Tool doesn't validate the ISBN. To Validate a ISBN use ISBN Validator