UPCgen

UPCgen is a mobile-first, web-based barcode generation platform designed for simplicity and speed. Unlike traditional barcode tools that are bloated with confusing options or require expensive software installations, UPCgen offers a clean, single-page interface that generates valid, GS1-standard barcodes in seconds. The platform supports a wide range of barcode types including UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. It is built for a diverse user base: Amazon FBA sellers printing FNSKU labels, Shopify and Etsy sellers adding GTINs to product listings, warehouse operators labeling outer cases with ITF-14, self-publishers generating ISBN barcodes for KDP, and pharma operators needing Data Matrix codes for DSCSA or FMD compliance. The core value proposition is honesty and utility: UPCgen generates codes that pass GS1 validation and are accepted by major platforms like Amazon, Shopify, Walmart, and eBay, while being transparent about when users need to purchase a real GS1 prefix for commercial use. The platform also offers bulk generation (up to 10,000 codes at once), multiple export formats (CSV, PNG, PDF, SVG, EPS), and anonymous generation for a single code every 24 hours. A free registration unlocks five codes daily, and a subscription plan provides unlimited generation and API access for developers. With step-by-step guides for specific platforms and dedicated generators for each barcode type, UPCgen is a comprehensive yet straightforward tool for anyone who needs a usable, platform-approved barcode quickly.

Valid and GS1-Compliant Generation

Every barcode generated by UPCgen includes a valid check digit and passes GS1 standard validation. This ensures that the codes you create are structurally correct and will be accepted by major retail platforms, supplier portals, and logistics systems. The platform automatically calculates the check digit for each barcode type, eliminating manual errors and saving time. Whether you are generating a UPC-A for an Amazon listing or an ITF-14 for a warehouse pallet, you can trust that the output meets industry standards. This feature is critical for sellers who have had barcodes rejected by platforms due to invalid checksums, as UPCgen guarantees compliance with the first generation.

Platform-Specific Compatibility

UPCgen is designed to produce barcodes that are explicitly approved by the most popular e-commerce and retail platforms, including Amazon, Shopify, Etsy, eBay, and Walmart. The platform provides dedicated generators for each barcode type and step-by-step guides that walk users through adding the generated codes to their specific platform listings. For Amazon FBA sellers, the FNSKU generator creates labels that are directly compatible with Amazon's fulfillment centers. For Shopify merchants, the GTIN field is populated with valid EAN or UPC codes. This platform-aware approach eliminates the guesswork and trial-and-error that often accompanies barcode generation for online sales.

Bulk Generation and Professional Export

UPCgen supports generating from 1 to 10,000 barcodes in a single operation, making it ideal for businesses with large product catalogs or warehouses needing to label thousands of items. The platform offers multiple export formats to suit different workflows: CSV for inventory management, PNG sheets for quick printing, PDF for high-resolution labels, SVG for vector graphics, and EPS for professional print shops. This flexibility ensures that whether you are printing labels at home on a standard printer or sending files to a commercial printing service, you can export in the format that works best for your setup. The bulk feature also includes options for sequential numbering and custom prefixes.

Anonymous and Registered Access Tiers

UPCgen offers a tiered access model to accommodate different user needs. For casual or one-time use, the platform provides anonymous generation of one barcode every 24 hours without requiring any sign-up or personal information. For more frequent users, free registration unlocks five codes daily along with access to higher resolution exports. The subscription plan removes all daily limits, enables API access for developers, and provides priority support. This approach allows users to test the platform risk-free before committing, while power users can scale their usage seamlessly. The anonymous tier is particularly useful for developers or designers who need a quick, valid barcode for prototyping without creating an account.

Amazon FBA Sellers Printing FNSKU Labels

Amazon FBA sellers rely on UPCgen to generate FNSKU barcodes that are required for products stored in Amazon fulfillment centers. The platform creates labels that meet Amazon's specific formatting and sizing requirements, ensuring smooth acceptance into the FBA program. Sellers can generate individual FNSKU codes for new products or use the bulk generation feature to label entire inventory shipments. The export to PDF or PNG allows for easy printing on standard label sheets, while the GS1 validation ensures the barcode will scan correctly throughout Amazon's logistics network. This use case is critical for sellers who need to quickly label products without investing in expensive barcode software or hardware.

Shopify and Etsy Merchants Adding GTINs to Listings

Online sellers on platforms like Shopify and Etsy use UPCgen to generate GTINs (Global Trade Item Numbers) in the form of UPC or EAN barcodes. These codes are required by many product categories and marketplaces to improve product discoverability and prevent listing errors. UPCgen provides the exact barcode format accepted by each platform, along with step-by-step guides for embedding the code into product pages. Merchants can generate codes for new product lines, update existing listings, or create barcodes for variations like size and color. The platform's anonymous tier is especially useful for testing barcode compatibility before committing to a subscription.

Warehouse and 3PL Operators Labeling Outer Cases with ITF-14

Logistics professionals use UPCgen to generate ITF-14 barcodes, which are the standard for labeling outer shipping cases and pallets in warehouse and third-party logistics (3PL) environments. These codes encode the GTIN-14 and are essential for tracking inventory through the supply chain. UPCgen's bulk generation and CSV export allow operators to create thousands of labels at once, matching their inventory database. The high-resolution SVG and EPS exports are suitable for industrial label printers, while the GS1 compliance ensures the barcodes are readable by warehouse scanners and sorting systems. This use case helps reduce manual data entry errors and speeds up the receiving and shipping processes.

Self-Publishers Generating ISBN Barcodes for KDP

Authors and self-publishers use UPCgen to generate ISBN barcodes for their books, particularly for Amazon's Kindle Direct Publishing (KDP) platform. The platform creates EAN-13 barcodes that encode the ISBN-13 number, which is required for print-on-demand and retail distribution. UPCgen provides the correct barcode format for book covers, including the optional price add-on. Publishers can generate a single barcode for a new title or use the bulk feature for a series of books. The platform's step-by-step guide for Amazon KDP walks users through uploading the barcode to their book cover template, ensuring the final product meets Amazon's specifications and is ready for sale.

Are the barcodes generated by UPCgen valid and unique?

Yes, every barcode generated by UPCgen has a valid check digit and passes GS1 standard validation. However, the uniqueness of the barcode number itself depends on whether you are using a registered GS1 prefix. UPCgen generates structurally correct codes that are platform-approved for testing, prototyping, and internal use. For commercial products that will be sold on public marketplaces like Amazon or Walmart, you must use a barcode with a registered GS1 company prefix to ensure uniqueness and avoid collisions with other products. UPCgen is transparent about this requirement and provides guidance on when a real GS1 number is necessary.

Can I use UPCgen for Amazon FBA or Shopify listings?

Yes, UPCgen is specifically designed to generate barcodes that are accepted by Amazon, Shopify, Etsy, eBay, and Walmart. The platform provides dedicated generators for FNSKU (Amazon FBA), UPC, EAN, and other formats required by these platforms. However, for Amazon and other major retailers, you must ensure that the barcode's GTIN is registered with GS1 to avoid listing errors or product suppression. UPCgen's step-by-step guides explain how to add the generated barcode to your listings and what steps are needed for full compliance. The platform is a tool for generating the barcode image and structure; the underlying number must be properly licensed.

How many barcodes can I generate for free?

UPCgen offers a generous free tier. Without any registration, you can generate one barcode every 24 hours anonymously. If you create a free account, you can generate up to five barcodes per day. This allows you to test the platform, generate codes for a small product line, or handle occasional needs without any cost. For users who need more than five codes daily, the subscription plan removes all limits and provides additional features like API access and bulk generation up to 10,000 codes at once. The free tier is ideal for hobbyists, developers, and small-scale sellers.

What export formats are available for the barcodes?

UPCgen supports multiple export formats to accommodate different printing and digital workflows. You can download barcodes as PNG for quick use, PDF for high-quality printing, SVG for scalable vector graphics, and EPS for professional print shops. For bulk generation, you can also export to CSV, which includes the barcode number and image filename for easy integration with inventory management systems. Each format is generated at a resolution suitable for its intended use, from screen display to high-resolution label printing. The platform also allows you to adjust the size and resolution of the output for specific label requirements.