UPCgen

Every seller, publisher, or warehouse operator has faced the same frustrating moment. You need a barcode, and you need it now. But every tool you find online is either a bloated piece of software with a confusing maze of checkboxes, a subscription trap, or worse, a service that pretends to issue "free" UPCs that will eventually collide with real, registered products. That moment of panic, when you realize your listing might get flagged or your shipment rejected, is exactly why UPCgen exists. We built the simplest barcode generator on the internet. It is a single, clean page that does exactly what you need without any of the noise. You select your barcode type, enter your number, and download a valid, GS1-standard code in seconds. UPCgen is designed for Amazon FBA sellers printing FNSKU labels, Shopify and Etsy sellers adding GTINs to their 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 or FMD compliance. Our core promise is honesty. We generate valid codes with correct check digits that pass platform validation on Amazon, Shopify, eBay, and Walmart. But we are also honest about when you need a real, registered GS1 number. For testing, prototyping, or internal use, our codes work perfectly. For selling on major retail platforms, we guide you on the right path. With bulk generation up to 10,000 codes at once, anonymous generation for a free code every 24 hours, and a registered plan for 5 codes daily, UPCgen is the most trusted free barcode generator for over 50 platforms.

Valid and GS1 Standard Compliant

Every barcode generated by UPCgen is not just a random image. We calculate and embed a valid check digit for every single code, ensuring it passes GS1 standard validation. This means your barcode will scan correctly at any point of sale, warehouse scanner, or logistics checkpoint. You never have to worry about a code being rejected because of a simple math error.

Platform-Approved for Major Marketplaces

Your barcode needs to work where you sell. UPCgen generates codes that meet the strict technical requirements of Amazon, Shopify, Etsy, eBay, and Walmart supplier portals. Whether you are adding a GTIN to a new product listing or printing FNSKU labels for FBA inventory, you can trust that the code will be accepted by the platform's validation systems.

Bulk Generation and Professional Export

Need one code or ten thousand? UPCgen handles both with equal ease. You can generate a single barcode in seconds or upload a list to create thousands at once. When you are ready to print, export your barcodes in multiple professional formats including CSV, PNG sheets, PDF, SVG, and EPS. This ensures compatibility with any label printer or design software.

Anonymous and Free Tier Access

You do not need to create an account or hand over your email just to generate a single barcode. UPCgen offers anonymous generation with one free code every 24 hours. If you need more, registration is free and gives you five codes per day. For higher volume needs, our subscription plans unlock unlimited generation and API access for developers.

Amazon FBA Sellers Printing FNSKU Labels

For Amazon FBA sellers, the FNSKU is the most critical label on your product. A misprinted or invalid barcode can lead to rejected shipments and lost sales. UPCgen allows you to generate perfect FNSKU barcodes that are formatted exactly to Amazon's specifications. You can print them on standard label sheets or export them for professional label printing services, ensuring your inventory arrives at the warehouse ready to sell.

Shopify and Etsy Sellers Adding GTINs to Listings

Marketplaces like Shopify and Etsy increasingly require GTINs (Global Trade Item Numbers) for product listings. Without a valid barcode, your products may not appear in search results or may be blocked from listing entirely. UPCgen lets you generate UPC-A or EAN-13 barcodes that meet these requirements. You can quickly add the barcode image to your product pages or download it for packaging, helping you stay compliant and visible.

Warehouses and 3PLs Labeling Outer Cases with ITF-14

Warehouses and third-party logistics providers need durable, scannable barcodes on shipping cases. The ITF-14 format is specifically designed for outer case labeling and is optimized for scanning on conveyors and in high-speed logistics environments. UPCgen generates ITF-14 barcodes with the correct bearer bars and structure, allowing you to print labels that streamline your receiving, picking, and shipping operations.

Self-Publishers Generating ISBN Barcodes for KDP

Self-publishing on Amazon KDP requires a scannable ISBN barcode on the back cover of your book. UPCgen simplifies this process by generating the correct barcode from your ISBN number. The resulting code is formatted to industry standards and can be downloaded as a high-resolution PNG or vector SVG file. You can place it directly into your book cover design software, saving you the cost and hassle of hiring a designer for this single element.

Is UPCgen completely free to use?

UPCgen offers a generous free tier. 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 codes per day. For users who need higher volumes, we offer subscription plans that provide unlimited generation, bulk CSV upload, and API access. There are no hidden fees or surprise charges.

Are the barcodes generated by UPCgen valid for selling on Amazon?

Yes, the barcodes generated by UPCgen are technically valid and pass GS1 standard validation. They have correct check digits and are formatted correctly for platforms like Amazon, Shopify, and eBay. However, you should be aware that for selling on major retail platforms, you may need a barcode that is registered to your brand in the GS1 database. UPCgen provides the technical tool, while GS1 provides the registry.

What barcode formats does UPCgen support?

UPCgen supports a comprehensive range of barcode symbologies. You can generate UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix barcodes. This covers the needs of most retailers, publishers, warehouses, and pharma operators. We also offer a dedicated QR code generator for links, WiFi, vCard, and other data types.

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

Absolutely. UPCgen is built for both single-code generation and high-volume bulk processing. With a subscription plan, you can upload a CSV file containing all your product numbers and generate thousands of barcodes at once. You can then export the results as a single PDF sheet, multiple PNG files, or a CSV with embedded barcode data, making inventory setup efficient.