justyourbarcodeISBN Converter
Convert between 10 and 13-digit ISBNs, with checks.
- 100% Free
- No Sign Up
- Works in Your Browser
ISBN converter
Convert ISBN-10 to ISBN-13 and back
With or without hyphens.
Checked in your browser. Nothing is uploaded.
Valid ISBN
Short forms: 978-030640615-7 and 030640615-2. The full hyphenation (group, publisher, title) depends on the ISBN range table, so copy the hyphens printed in the book.
Make the ISBN barcode (Bookland EAN-13 with a price add-on).
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Every barcode you need, made right in your browser.
No software. No uploads. No signup.
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How to use the ISBN converter
Three steps, all in your browser.
- 1
Enter a number
Type or paste a number. Spaces and dashes are ignored.
- 2
Read the result
See whether the number is valid, with the working shown.
- 3
Copy the result
Copy the corrected or converted number in one click.
ISBN Converter: what to know
Books published before 2007 often have 10-digit ISBNs, while everything now uses 13. The ISBN converter turns an ISBN-10 into its ISBN-13 by adding the 978 prefix and calculating a new check digit, and turns a 978 ISBN-13 back into its ISBN-10.
The two systems use different check digits. ISBN-10 weights the digits 10 down to 1 and uses mod 11, so its check digit can be 10, written X. ISBN-13 uses the GS1 mod 10 rule with weights of 1 and 3, so its check digit is always a digit. The converter validates the check digit you enter before converting.
ISBN-13s starting with 979 have no ISBN-10 equivalent; they were introduced when the 978 range began to run out, and 979-0 is used for printed music (ISMN).
Popular uses
- Updating old catalogue records to ISBN-13
- Matching book data from sources that use different formats
- Finding the ISBN-10 that older systems and listings ask for
- Checking an ISBN for typos before ordering or publishing
Tips for the best result
- Hyphens are ignored, so paste ISBNs as they're printed.
- An X in an ISBN-10 can only be the last character.
- To make a barcode from an ISBN, use the ISBN barcode generator.
Read how JustYourBarcode works and our privacy details. Numbers, pictures, CSV files and camera frames are processed in your browser and are never sent to our server. A barcode doesn't register a product number: retail UPC and EAN numbers come from GS1.