UPCgen

UPCgen is a straightforward, honest, and powerful online barcode generator designed for anyone who needs a valid, scannable code in seconds. Whether you are an Amazon FBA seller printing FNSKU labels, a Shopify merchant adding GTINs to product listings, a self-publisher creating ISBN barcodes for books, or a warehouse manager labeling boxes with ITF-14 codes, UPCgen provides a clean, no-nonsense solution. Unlike other tools that are bloated with confusing options or disingenuously offer "free" UPCs that can conflict with real registered products, UPCgen focuses on one thing: generating a valid, platform-approved barcode that downloads cleanly and works immediately. The platform supports a wide range of barcode types, including UPC-A, EAN-13, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. It validates every code against GS1 standards to ensure the check digit is correct, making it safe for use on major marketplaces like Amazon, Shopify, Etsy, eBay, and Walmart. UPCgen is built for speed and simplicity. You can generate a single barcode without even signing up, or you can create thousands at once with a free or paid plan. It is the most trusted free barcode generator for sellers, publishers, and developers who need reliable codes without the hassle.

Valid and GS1-Compliant Codes

Every barcode generated by UPCgen includes a mathematically correct check digit that passes GS1 standard validation. This means you can be confident that your barcode will scan properly at point-of-sale systems and be accepted by major retailer portals like Amazon and Walmart. No more worrying about rejected listings due to invalid or duplicate codes.

Platform-Approved Barcodes

UPCgen specifically designs its barcodes to meet the strict requirements of the world's largest ecommerce platforms. Whether you are listing on Amazon, Shopify, Etsy, eBay, or Walmart, the codes generated here are formatted correctly for their supplier portals. This saves you the headache of having to redo labels because a code was not accepted.

Bulk Generation and Export Options

Need more than one barcode? UPCgen has you covered. You can generate anywhere from 1 to 10,000 barcodes in a single session. Once generated, you can export your codes in multiple formats, including CSV for spreadsheets, PNG sheets for easy printing, professional PDF files, SVG, or EPS. This is ideal for warehouses labeling inventory or for sellers managing large product catalogs.

Anonymous and Free Tier

You can start using UPCgen immediately without providing any personal information. The free tier allows you to generate one barcode every 24 hours completely anonymously. If you need more, you can register a free account to get five codes per day. This low-friction approach makes it incredibly easy to test the service and get your first barcode without any commitment.

Amazon FBA Sellers Printing FNSKU Labels

For Amazon FBA sellers, creating accurate FNSKU labels is critical for inventory management and warehouse receiving. UPCgen allows you to generate valid FNSKU barcodes quickly and in bulk. You can download them as a PDF or PNG sheet, print them on standard label paper, and apply them to your products. This ensures your shipments are processed smoothly by Amazon's fulfillment centers.

Shopify and Etsy Sellers Adding GTINs

Selling on Shopify or Etsy requires you to provide valid GTINs (Global Trade Item Numbers) for many product categories. UPCgen lets you generate EAN-13 or UPC-A barcodes that serve as valid GTINs. By using these codes, you can comply with platform requirements, improve your product discoverability, and avoid listing errors that can lead to product suppression or account warnings.

Warehouses and 3PLs Labeling Outer Cases

Third-party logistics providers and warehouse managers need to label outer cartons with ITF-14 codes for efficient shipping and tracking. UPCgen's ITF-14 generator creates these specialized barcodes that are designed to be printed directly on corrugated boxes. This streamlines the receiving and shipping process, reduces manual data entry errors, and ensures your inventory is accurately tracked through the supply chain.

Self-Publishers Generating ISBN Barcodes

Independent authors and self-publishers using platforms like Amazon KDP or IngramSpark need ISBN barcodes for their book covers. UPCgen provides a dedicated ISBN barcode generator that creates the correct, scannable code for your book's ISBN. This allows you to produce print-ready barcode images for your cover design, ensuring your book can be sold in bookstores and online retailers worldwide.

What is the difference between a free UPC and a registered UPC from GS1?

A free UPC generated by UPCgen is a valid barcode with a correct check digit, but it is not a registered, globally unique number from GS1. These codes are fine for internal use, testing, or for platforms that do not require a verified GS1 prefix. However, for selling on major retail marketplaces like Amazon or Walmart, you typically need a registered UPC purchased from GS1 or an authorized reseller to avoid potential conflicts with other products.

Can I use UPCgen barcodes on Amazon and other platforms?

Yes, UPCgen barcodes are designed to meet the technical requirements of Amazon, Shopify, Etsy, eBay, and Walmart. They have valid check digits and the correct formatting. However, please note that for Amazon, you may need to provide a GS1-verified UPC for certain product categories. UPCgen provides the code, but it is your responsibility to ensure the number is appropriate for your specific selling needs.

How many barcodes can I generate for free?

You can generate one barcode every 24 hours without creating an account. If you register for a free account, you can generate up to five barcodes every 24 hours. This is perfect for testing the service or for sellers who only need a few codes occasionally. For higher volumes, you can subscribe to a paid plan that allows for bulk generation.

What barcode types does UPCgen support?

UPCgen supports a wide range of common barcode symbologies. These include UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. This variety makes it a versatile tool for different industries, from retail and publishing to logistics and pharmaceutical compliance (DSCSA/FMD).