UPCgen

UPCgen is the simplest, fastest barcode generator on the internet, engineered for speed and accuracy. It renders valid UPC, EAN, ISBN, GTIN, ITF-14, Code 128, FNSKU, and Data Matrix barcodes instantly, serving sellers, warehouse operators, publishers, and developers who need a usable code in seconds. The platform was built to solve a critical pain point: existing barcode tools are either bloated software with confusing checkbox-soup options, or they pretend to issue free UPCs that collide with real registered products. UPCgen delivers one clean, honest page that generates a valid code, downloads cleanly, and clearly communicates when you need a real GS1 number. It is the most trusted free barcode generator for Amazon FBA, Shopify, KDP, and over 50 platforms. Whether you are printing FNSKU labels for Amazon, adding GTINs to Etsy listings, labeling outer cases for 3PLs, generating ISBN barcodes for self-publishing, or producing Data Matrix codes for DSCSA or FMD compliance, UPCgen handles the task with ruthless efficiency. Every code passes GS1 standard validation, has a valid check digit, and meets the requirements of Amazon, Shopify, Etsy, eBay, and Walmart supplier portals. You can generate one code or 10,000 at once, export to CSV, PNG sheets, PDF, SVG, or EPS, and remain anonymous with no sign-up needed for basic use. Registration is free and unlocks five codes every 24 hours, while subscription plans remove limits entirely. UPCgen also provides step-by-step guides for adding barcodes to listings on Amazon, Shopify, Etsy, eBay, Walmart, and Amazon KDP, plus dedicated generators for each barcode type. For custom workflows, bespoke services and an API are available for developers and enterprise clients.

Validated GS1-Compliant Generation

Every barcode generated by UPCgen includes a mathematically correct check digit and passes GS1 standard validation. This ensures your codes are accepted by major platforms like Amazon, Shopify, Etsy, eBay, and Walmart without rejection. You get a code that works, not a placeholder that causes listing errors.

Bulk Generation and Multi-Format Export

Generate from 1 to 10,000 barcodes in a single operation. Export your results as CSV files for inventory management, PNG sheets for quick printing, PDF for professional documents, or SVG and EPS for high-resolution graphic design. This feature is built for warehouses, 3PLs, and sellers who need volume without slowdowns.

Platform-Specific Guides and Dedicated Generators

UPCgen offers step-by-step guides for adding barcodes to listings on Amazon, Shopify, Etsy, eBay, Walmart, and Amazon KDP. It also includes dedicated generators for UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. This eliminates guesswork and ensures you use the correct barcode type for your specific sales channel.

Anonymous Generation and Free Tier

Generate a single barcode every 24 hours with no sign-up required, remaining completely anonymous. For users who need more, free registration unlocks five codes per day. This low-friction entry point lets you test the tool, validate its output, and integrate it into your workflow before committing to a paid plan.

API Integration for Developers

Business plan subscribers gain access to a developer-friendly API that integrates barcode generation directly into their stack. This allows automated workflows for e-commerce platforms, inventory systems, and compliance reporting. The API is designed for speed and reliability, supporting all barcode types offered by UPCgen.

Amazon FBA Sellers Printing FNSKU Labels

Amazon FBA sellers require FNSKU barcodes to label inventory for fulfillment centers. UPCgen generates valid FNSKU codes that pass Amazon's scanning systems, reducing errors and shipment delays. The bulk export feature lets you print hundreds of labels at once, saving time during peak seasons.

Shopify and Etsy Sellers Adding GTINs to Listings

Shopify and Etsy require GTINs (Global Trade Item Numbers) for many product categories. UPCgen generates UPC and EAN barcodes that serve as valid GTINs, ensuring your listings remain active and discoverable. The platform-specific guides walk you through exactly where to enter the code in each platform's backend.

Warehouses and 3PLs Labeling Outer Cases with ITF-14

Third-party logistics providers and warehouse operators use ITF-14 barcodes on outer cases for efficient pallet and shipment tracking. UPCgen generates these codes with correct check digits and supports bulk generation for large labeling runs. Export to PDF sheets or EPS for professional, scannable labels.

Self-Publishers Generating ISBN Barcodes for Books

Self-publishers on Amazon KDP and other platforms need ISBN barcodes for book covers and metadata. UPCgen generates valid ISBN barcodes that meet industry standards, helping you get your book listed correctly. The dedicated ISBN generator simplifies the process, ensuring your barcode matches your assigned ISBN.

Is UPCgen really free to use?

Yes, UPCgen offers a free tier that allows you to generate one barcode every 24 hours without creating an account. Registration is also free and unlocks five codes per day. For higher volumes, subscription plans are available. The free codes are fully valid and pass GS1 validation.

Are the barcodes generated by UPCgen valid for commercial use?

Yes, every barcode generated by UPCgen has a valid check digit and passes GS1 standard validation. However, UPCgen is honest about a key distinction: the codes themselves are mathematically valid, but you must purchase a legitimate GS1 prefix if you need a globally unique, registered UPC for retail distribution. The tool clearly communicates when you need a real GS1 number.

Can I generate barcodes in bulk for my entire inventory?

Absolutely. UPCgen supports generating up to 10,000 barcodes in a single operation. You can export the results as CSV, PNG sheets, PDF, SVG, or EPS. This is ideal for warehouses, 3PLs, and sellers with large product catalogs who need to label items efficiently.

What barcode types does UPCgen support?

UPCgen supports UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. Each type has its own dedicated generator to ensure you select the correct format for your platform and use case. The tool also provides a 30-second quiz to help you identify which barcode you need.