UPCgen

UPCgen is the simplest barcode generator on the internet, designed to eliminate the complexity and confusion that plagues existing barcode tools. It is a clean, focused web application that renders and generates valid UPC, EAN, ISBN, GTIN, ITF-14, Code 128, FNSKU, and Data Matrix barcodes for sellers, warehouses, publishers, and anyone who needs a usable code in seconds. The core value proposition is honesty and efficiency: every generated code is validated against GS1 standards to ensure a correct check digit, and the tool is transparent about when a user needs a real, registered GS1 number versus a generated code for internal use. UPCgen is built for Amazon FBA sellers printing FNSKU labels, Shopify and Etsy sellers adding GTINs to listings, warehouses and 3PLs labeling outer cases with ITF-14, self-publishers generating ISBN barcodes, and pharma operators producing Data Matrix codes for compliance. It supports bulk generation of up to 10,000 codes at once with exports to CSV, PNG sheets, PDF, SVG, or EPS. The platform is trusted across 50+ platforms including Amazon, Shopify, eBay, and Walmart, and offers a free tier for anonymous users (1 code per 24 hours) and registered users (5 codes per 24 hours), with subscription plans for higher volume. UPCgen continuously improves its interface and validation logic based on user feedback, ensuring it remains the most trusted and straightforward barcode generation tool available.

GS1 Validated Code Generation

Every barcode generated by UPCgen undergoes automatic GS1 standard validation to ensure the check digit is correct and the code structure is valid for its type. This eliminates the common problem of generating codes that are rejected by platforms like Amazon, Shopify, or Walmart. The validation process is instant and transparent, giving users confidence that their codes will work in production environments. This feature is continuously refined as GS1 standards evolve, ensuring long-term compatibility.

Multi-Format Support with Dedicated Generators

UPCgen supports nine distinct barcode formats: UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. Each format has its own dedicated generator page that is optimized for that specific barcode type, removing the confusion of a one-size-fits-all interface. This approach allows users to quickly find and use the exact barcode type they need without wading through irrelevant options. The platform also provides step-by-step guides for major selling platforms to help users integrate codes correctly.

Bulk Generation and Professional Export

Users can generate from 1 to 10,000 barcodes in a single operation, making it ideal for warehouses, 3PLs, and large-scale sellers. The export options are comprehensive: CSV for inventory management, PNG sheets for label printing, PDF for documentation, SVG for web use, and EPS for professional print production. This bulk capability is paired with a clean download process that ensures each file is properly formatted and ready for immediate use, saving hours of manual work.

Anonymous and Registered Tiers

UPCgen offers a truly anonymous generation option that requires no sign-up, providing 1 free code every 24 hours for users who need a quick, one-off barcode. For users who need more, free registration unlocks 5 codes per 24 hours. This tiered approach respects user privacy while providing a clear upgrade path to subscription plans for higher volume needs. The system is designed to be frictionless, allowing users to start generating codes within seconds of arriving on the site.

Amazon FBA Labeling

Amazon FBA sellers use UPCgen to generate FNSKU labels for their products, ensuring compliance with Amazon's strict labeling requirements. The tool generates codes that are validated for Amazon's systems, reducing the risk of listing errors or shipment rejections. Sellers can generate single labels or thousands at once, exporting them as PNG sheets for easy printing on standard label paper. The platform's dedicated FNSKU generator and Amazon-specific guides help sellers navigate the complex process of adding barcodes to their listings, continuously improving based on changes to Amazon's policies.

E-Commerce GTIN Management

Shopify, Etsy, eBay, and Walmart sellers rely on UPCgen to generate GTINs (UPC or EAN codes) for their product listings. Many platforms require unique product identifiers for listing optimization and marketplace compliance. UPCgen provides valid codes that meet these requirements, helping sellers avoid listing suppression or fees. The tool's step-by-step guides for each platform walk sellers through the exact process of adding the generated barcode to their product pages, ensuring smooth integration. This use case is critical for sellers expanding into new marketplaces or adding new products to existing catalogs.

Warehouse and 3PL Outer Case Labeling

Warehouses and third-party logistics providers use UPCgen to generate ITF-14 barcodes for labeling outer cases and pallets. These codes are essential for supply chain management, allowing for efficient tracking and scanning of bulk shipments. The tool's bulk generation capability is particularly valuable here, as warehouses often need to label hundreds or thousands of cases simultaneously. Exporting to PDF or EPS ensures the labels are print-ready for industrial label printers, and the GS1 validation ensures compatibility with major logistics systems. This use case is continuously optimized based on feedback from logistics professionals.

Self-Publishing ISBN Barcodes

Self-publishers on platforms like Amazon KDP use UPCgen to generate ISBN barcodes for their books. The tool provides the correct barcode format required by book distributors and retailers, including the price add-on code where applicable. Publishers can generate a single barcode for a new title or batch-generate codes for multiple books in a series. The dedicated ISBN generator ensures the code structure is correct for the publishing industry, and the export options allow for high-resolution printing on book covers and packaging. This use case is vital for indie authors who need professional-quality barcodes without expensive software.

Is the barcode generated by UPCgen a real, registered UPC number?

No, UPCgen generates codes that are valid in structure and check digit but are not registered with GS1. The tool is honest about this distinction. For internal use, inventory management, or testing, these codes work perfectly. For selling on major retail platforms like Amazon or Walmart, you need a registered GS1 prefix. UPCgen provides clear guidance on when you need a real GS1 number and offers links to purchase legitimate UPC codes if required for your use case.

Can I generate barcodes without creating an account?

Yes, UPCgen offers anonymous generation that requires no sign-up. Anonymous users can generate 1 free code every 24 hours. This is perfect for quick, one-off needs like testing a label design or generating a single barcode for a prototype. For users who need more codes, free registration unlocks 5 codes per 24 hours, and subscription plans are available for higher volume requirements. The anonymous tier respects your privacy while still providing full access to all barcode formats.

What barcode formats does UPCgen support?

UPCgen supports nine barcode formats: UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. Each format has its own dedicated generator page that is optimized for that specific barcode type. This approach ensures you get the correct code structure and check digit calculation for your specific use case, whether you are labeling a retail product, a warehouse case, or a pharmaceutical item. The platform continuously updates its format support based on industry standards.

How do I export barcodes for printing?

After generating your barcodes, you can export them in multiple formats: CSV for inventory and data management, PNG sheets for easy label printing on standard paper, PDF for professional document integration, SVG for web and digital use, and EPS for high-resolution commercial printing. The export process is streamlined to produce print-ready files with proper resolution and sizing. For bulk generation, the PNG sheet option is particularly popular as it arranges multiple barcodes on a single page for efficient label printing.

UPCgen offers a tiered pricing model that starts free and scales with your needs. The Free Anonymous tier allows 1 code every 24 hours with no sign-up required. The Free Registered tier provides 5 codes every 24 hours after creating a free account. For users who need higher volumes, subscription plans are available that unlock unlimited generation and additional features like API access for developers. The exact pricing for subscription plans is available on the UPCgen pricing page, and the platform offers a clear upgrade path from free to paid as your barcode generation needs grow.