A Developer's Guide to the ISBN Validator & Converter

The ISBN Validator & Converter is an essential tool for authors, publishers, librarians, and developers working with book data. It allows you to verify the integrity of an International Standard Book Number (ISBN) and convert between the older 10-digit and modern 13-digit formats.

Features

• Dual Format Validation: Validates both ISBN-10 and ISBN-13 formats using their respective checksum algorithms.
• Format-Agnostic Input: You can paste an ISBN with or without hyphens and spaces; the tool will clean it automatically before validation.
• Bi-directional Conversion:
  • If you enter a valid ISBN-10, it will be automatically converted to its ISBN-13 equivalent.
  • If you enter a valid ISBN-13 (that starts with the "978" bookland prefix), it will be converted to its legacy ISBN-10 format.
• ISBN-13 Part-of-Speech Decoding: For valid ISBN-13s, the tool breaks down the number into its constituent parts, showing the EAN prefix, registration group, registrant, and publication codes. (Note: This is a simplified breakdown for demonstration).

How to Use

1. Enter the ISBN: Type or paste an ISBN-10 or ISBN-13 into the input field.
2. Click Validate & Convert: Press the button to run the validation and conversion.
3. Review the Results:
   • An alert will first tell you if the entered ISBN is Valid or Invalid.
   • If valid, you will see the converted format (if applicable).
   • You will also see a breakdown of the ISBN-13's different parts.