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Bublos ISBN Converter:

Using the tool below you are able to convert ISBN-10's into ISBN-13 references or the new-style ISBN-13's back into ISBN-10 references. You are also able to validate both ISBN-10 and ISBN-13 references.

You may enter the ISBN references either with or without hyphens, but remember that only ISBN-10 references have any letters in them at all, which is in the instance where the letter "X" happens to be used as the check-digit (ie. the tenth position). ISBN-13 check-digits are all numbers, and hence ISBN-13's are composed entirely of digits.

Enter ISBN reference:  

   
    Convert ISBN-10 to ISBN-13
Convert ISBN-13 to ISBN-10
Validate the ISBN reference
Results:
Enter either an ISBN-10 or ISBN-13 book reference in the box above and select the action you require. We will convert the ISBN or validate it as requested.

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