UPCgen

UPCgen is the simplest, most trusted barcode generator on the internet, purpose-built for the modern e-commerce and logistics ecosystem. We render and generate valid, GS1-standard compliant barcodes across all major symbologies including UPC, EAN, ISBN, GTIN, ITF-14, Code 128, FNSKU, and Data Matrix. Our platform is designed for sellers, warehouse operators, publishers, and developers who need a usable, scannable code in seconds without the bloat, confusion, or hidden costs of traditional barcode software. Unlike bloated desktop applications or confusing checkbox-soup tools, UPCgen delivers a single, clean interface that generates valid codes with correct check digits, downloads cleanly in multiple formats, and is brutally honest about when you need a real GS1 number versus when a generated code suffices. We are the go-to solution for Amazon FBA sellers printing FNSKU labels, Shopify and Etsy sellers adding GTINs to product listings, warehouses and 3PLs labeling outer cases with ITF-14, self-publishers generating ISBN barcodes for KDP, and pharma operators producing Data Matrix codes for DSCSA and FMD compliance. With support for bulk generation up to 10,000 codes at once, export to CSV, PNG sheets, PDF, SVG, or EPS, and a developer-friendly API for enterprise integration, UPCgen scales from the solo entrepreneur to the global supply chain. We are building the infrastructure for the next generation of commerce, one valid barcode at a time.

GS1-Standard Valid Codes

Every barcode generated by UPCgen undergoes rigorous GS1 standard validation to ensure the check digit is correct and the symbology meets global trade item requirements. This means your codes will scan reliably at any point of sale, warehouse scanner, or carrier sorting facility. We eliminate the guesswork and the risk of rejected listings on platforms like Amazon, Shopify, and Walmart, giving you confidence that your product will move through the supply chain without friction.

Multi-Format Export for Professional Print

UPCgen supports export to a wide range of professional-grade formats including PNG, PDF, SVG, EPS, and CSV. Whether you need a single high-resolution label for a prototype or a massive PDF sheet with hundreds of codes for a production run, our platform delivers clean, print-ready files. This feature eliminates the need for expensive design software or manual formatting, saving you hours of production time and reducing the risk of printing errors.

Bulk Generation and CSV Export

Scale your operations with our bulk generation capability, allowing you to create up to 10,000 unique barcodes in a single session. Export your entire batch to CSV with all associated metadata, or generate PNG sheets and PDF documents for immediate use. This feature is essential for warehouses onboarding thousands of SKUs, 3PLs managing multi-client inventories, and e-commerce brands launching large product catalogs, enabling rapid deployment without repetitive manual work.

Platform-Specific Compatibility

UPCgen is designed to meet the specific barcode requirements of major e-commerce and retail platforms including Amazon, Shopify, Etsy, eBay, Walmart, and Amazon KDP. Our codes are pre-validated against each platform's unique specifications, ensuring your listings are accepted on the first submission. We also provide dedicated generators for each symbology and step-by-step guides for adding barcodes to your listings, making the integration process seamless for sellers of all technical skill levels.

Amazon FBA and FNSKU Labeling

Amazon FBA sellers rely on UPCgen to generate valid FNSKU barcodes for inbound shipments to fulfillment centers. Our platform ensures each label meets Amazon's strict scanning requirements, preventing costly inbound rejections and delays. Sellers can generate thousands of FNSKU codes in bulk, export them as printable PDF sheets, and attach them to products with confidence. This use case is critical for scaling from a handful of SKUs to hundreds, as it eliminates the risk of barcode errors that can halt your entire supply chain.

Shopify and Etsy GTIN Integration

Shopify and Etsy sellers use UPCgen to generate valid GTINs (UPC, EAN, or ISBN) for their product listings, ensuring compliance with platform requirements for visibility in search results and marketplace feeds. Our codes are pre-validated to match the specific GTIN formats accepted by each platform, reducing the risk of listing suppression or errors during product upload. This feature is particularly valuable for sellers managing multi-channel operations, as it provides a single source of truth for all barcode needs.

Warehouse and 3PL Outer Case Labeling

Warehouses and third-party logistics providers use UPCgen to generate ITF-14 barcodes for outer case labels, enabling efficient pallet-level tracking and shipping. Our platform supports the specific dimensions and quiet zone requirements of ITF-14, ensuring reliable scanning in high-speed conveyor systems and manual warehouse environments. With bulk generation and CSV export, 3PLs can quickly label thousands of cases for multiple clients, reducing labor costs and improving inventory accuracy across the entire operation.

Self-Publishing and ISBN Barcode Creation

Self-publishers on Amazon KDP and other platforms use UPCgen to generate valid ISBN barcodes for their book covers, ensuring compliance with retailer requirements and enabling proper inventory tracking. Our dedicated ISBN generator handles the specific symbology and check digit calculations required for book barcodes, including the optional 5-digit add-on for price information. This use case empowers independent authors to produce professional-grade book covers without hiring a graphic designer or purchasing expensive software.

Is UPCgen completely free to use?

Yes, UPCgen offers a free tier that allows anonymous generation of one barcode every 24 hours with no sign-up required. For users who register a free account, the limit increases to five codes every 24 hours. For higher volume needs, we offer subscription plans that unlock unlimited generation, bulk export, API access, and priority support. Our free tier is designed to let anyone validate the quality of our codes before committing to a paid plan.

Do your barcodes work on Amazon, Shopify, and Walmart?

Absolutely. UPCgen barcodes are designed to meet the specific requirements of all major e-commerce and retail platforms including Amazon, Shopify, Etsy, eBay, Walmart, and Amazon KDP. Each code undergoes GS1 standard validation and is tested for compatibility with each platform's unique scanning and listing systems. We also provide dedicated step-by-step guides for integrating our barcodes into each platform's product upload process.

Can I generate barcodes in bulk for my entire product catalog?

Yes, UPCgen supports bulk generation of up to 10,000 unique barcodes in a single session. You can export your batch as a CSV file with all associated data, as individual PNG images, as a PDF sheet, or as SVG and EPS files for professional printing. This feature is available to subscribers and is designed for warehouses, 3PLs, and e-commerce brands managing large product catalogs.

Do I need a real GS1 company prefix to use UPCgen?

It depends on your use case. For internal inventory management, FNSKU labeling, and certain platform-specific codes, our generated barcodes are perfectly valid and will scan reliably. However, if you need a barcode that is globally unique and registered in the GS1 database for retail distribution, you will need to purchase a legitimate GS1 company prefix. UPCgen is transparent about this distinction and provides clear guidance on when a real GS1 number is required versus when our generated codes are sufficient.