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ISBN-13 Generator

Generate random 13-digit ISBN numbers for testing, development, and educational use. The checksum is calculated using alternating weights of 1 and 3.

Your ISBN-13

978-0-000000-00-0

Generate in Bulk

Generate multiple ISBN-13 numbers at once. Maximum: 50.

Generated ISBN-13 List

Important: These ISBN-13 numbers are randomly generated for testing only. They are not officially registered ISBNs and must not be used for real publishing or commercial book sales.
window.addEventListener("load", function () { const resultEl = document.getElementById("isbnusResult"); const generateBtn = document.getElementById("isbnusGenerateBtn"); const copyBtn = document.getElementById("isbnusCopyBtn"); const bulkCountBtns = document.querySelectorAll(".isbnus-bulk-count"); const bulkGenerateBtn = document.getElementById("isbnusBulkGenerateBtn"); const bulkOutputBox = document.getElementById("isbnusBulkOutputBox"); const bulkOutput = document.getElementById("isbnusBulkOutput"); const copyAllBtn = document.getElementById("isbnusCopyAllBtn"); const downloadBtn = document.getElementById("isbnusDownloadBtn"); let selectedBulkCount = 10; let currentBulkList = []; function randomDigit() { return Math.floor(Math.random() * 10); } function generateRawISBN13() { let digits = [9, 7, 8]; while (digits.length < 12) { digits.push(randomDigit()); } let sum = 0; for (let i = 0; i < 12; i++) { sum += digits[i] * (i % 2 === 0 ? 1 : 3); } const checkDigit = (10 - (sum % 10)) % 10; digits.push(checkDigit); return digits.join(""); } function formatISBN13(raw) { return ( raw.slice(0, 3) + "-" + raw.slice(3, 4) + "-" + raw.slice(4, 10) + "-" + raw.slice(10, 12) + "-" + raw.slice(12) ); } function generateISBN13() { return formatISBN13(generateRawISBN13()); } function setSingleISBN() { if (!resultEl) return; resultEl.textContent = generateISBN13(); } async function copyText(text) { try { await navigator.clipboard.writeText(text); } catch (err) { const textarea = document.createElement("textarea"); textarea.value = text; document.body.appendChild(textarea); textarea.select(); document.execCommand("copy"); document.body.removeChild(textarea); } } function generateBulkISBNs(count) { const list = []; for (let i = 0; i < count; i++) { list.push(generateISBN13()); } currentBulkList = list; if (bulkOutput) { bulkOutput.value = list.join("\n"); } if (bulkOutputBox) { bulkOutputBox.style.display = "block"; } } function downloadCSV() { const list = currentBulkList.length ? currentBulkList : [resultEl.textContent]; const csvContent = "ISBN-13\r\n" + list.join("\r\n"); const blob = new Blob( [csvContent], { type: "text/csv;charset=utf-8;" } ); const url = URL.createObjectURL(blob); const link = document.createElement("a"); link.href = url; link.download = "isbnus-isbn13.csv"; document.body.appendChild(link); link.click(); document.body.removeChild(link); URL.revokeObjectURL(url); } if (generateBtn) { generateBtn.addEventListener("click", function () { setSingleISBN(); }); } if (copyBtn) { copyBtn.addEventListener("click", async function () { await copyText(resultEl.textContent); copyBtn.textContent = "Copied"; setTimeout(function () { copyBtn.textContent = "Copy"; }, 1200); }); } bulkCountBtns.forEach(function (button) { button.addEventListener("click", function () { bulkCountBtns.forEach(function (item) { item.classList.remove("active"); }); button.classList.add("active"); selectedBulkCount = parseInt( button.dataset.count, 10 ); }); }); if (bulkGenerateBtn) { bulkGenerateBtn.addEventListener("click", function () { generateBulkISBNs(selectedBulkCount); }); } if (copyAllBtn) { copyAllBtn.addEventListener("click", async function () { await copyText(bulkOutput.value); copyAllBtn.textContent = "Copied"; setTimeout(function () { copyAllBtn.textContent = "Copy All"; }, 1200); }); } if (downloadBtn) { downloadBtn.addEventListener("click", function () { downloadCSV(); }); } setSingleISBN(); });

How It Works

This ISBN-13 generator creates random ISBN-style numbers that follow the standard 13-digit ISBN format. The tool is designed for testing, development, educational examples, database demos, and software validation where real registered ISBNs are not required.First, the generator creates a random 12-digit base number. This number usually begins with a valid ISBN prefix such as 978 or 979, which is commonly used for ISBN-13 numbers.Next, the tool applies the ISBN-13 check digit calculation. The first 12 digits are processed using alternating weights of 1 and 3. The result is used to calculate the final digit, known as the check digit.The check digit helps confirm that the ISBN follows the correct numeric structure. If one digit is entered incorrectly, the check digit formula can often detect that the number is invalid.After the check digit is added, the full 13-digit ISBN is displayed. The number may also be shown with hyphens to make it easier to read, copy, or use in test data.Generated ISBNs from this website are for testing, development, educational, and scientific purposes only. They may follow the correct ISBN-13 format, but they are not officially registered ISBNs. Do not use them for real publishing, commercial book sales, library records, or official book identification.

About ISBN

An ISBN, or International Standard Book Number, is a unique identification number used for books and book-related publications. It helps publishers, bookstores, libraries, distributors, online retailers, and cataloging systems identify a specific book, edition, or format.The modern ISBN format is ISBN-13, which contains 13 digits. Each ISBN-13 is designed to identify one specific publication product. For example, a paperback version, hardcover version, ebook version, and audiobook version of the same title may each have different ISBNs.An ISBN-13 is usually divided into several parts. These parts can identify the ISBN prefix, registration group, publisher or registrant, specific publication, and check digit. The check digit is the final digit of the ISBN and is used to help validate that the number follows the correct ISBN-13 structure.ISBNs are important because they make book identification more accurate and consistent. Without ISBNs, different books with similar titles, authors, or editions could be confused in sales systems, library databases, and publishing records.This website generates ISBN-13 numbers for testing, development, educational, and scientific purposes only. The generated numbers may follow the correct ISBN-13 format, but they are not officially registered ISBNs. They should not be used for real publishing, commercial book sales, or official book identification.

FAQ

What is an ISBN?An ISBN, or International Standard Book Number, is a unique number used to identify books and book-related publications. It helps publishers, bookstores, libraries, and online systems identify a specific title, edition, or format.What is ISBN-13?ISBN-13 is the current 13-digit ISBN format. It usually begins with the prefix 978 or 979 and includes a final check digit used to validate the number’s structure.Are the ISBNs generated on this website official?No. The ISBNs generated on this website are not officially registered. They are intended only for testing, development, education, and scientific use.Can I use a generated ISBN for publishing a real book?No. A generated ISBN should not be used for real publishing, commercial book sales, library records, or official book identification. To publish a real book, you need an ISBN from an official ISBN agency or authorized provider.Why would I need a random ISBN generator?A random ISBN generator is useful for testing software, databases, forms, catalog systems, ecommerce features, validation tools, or educational examples where real ISBNs are not required.Do generated ISBNs follow the correct ISBN-13 format?Yes, generated ISBNs may follow the correct ISBN-13 structure, including the check digit. However, correct formatting does not mean the ISBN is officially assigned or registered.What is the ISBN check digit?The check digit is the final digit of an ISBN-13. It is calculated from the first 12 digits and helps verify whether the ISBN follows the correct numeric pattern.Can two books have the same ISBN?In official publishing, each ISBN should identify a specific publication, edition, or format. For example, hardcover, paperback, ebook, and audiobook versions of the same book may each have different ISBNs.Is this tool free to use?Yes. You can use this ISBN generator for testing, development, educational, and non-commercial validation purposes.Does this website store the ISBNs I generate?No. The generated ISBNs are created for immediate use. You should copy or download any numbers you want to keep.

Contact

Have a question, suggestion, or issue with the ISBN-13 generator? You can contact us for support, feedback, or general inquiries about how the tool works.

Thank you

Thank you for contacting us.We have received your message and will review it as soon as possible. If your inquiry is about ISBN registration, please note that this website only provides ISBN-13 numbers for testing, development, educational, and scientific purposes. Generated ISBNs are not officially registered and should not be used for real publishing or commercial book sales.We appreciate your feedback and will get back to you if a response is needed.