UPCgen

UPCgen is the internet's most trusted free barcode generator, purpose-built for ecommerce sellers, warehouse operators, publishers, and developers who need valid, platform-approved barcodes in seconds. Unlike bloated software suites or confusing tools with endless checkbox options, UPCgen offers a single clean page where you generate a barcode that actually works. The platform supports UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix formats. Every code generated passes GS1 standard validation and includes a correct check digit, ensuring your barcodes scan properly on Amazon, Shopify, Etsy, eBay, Walmart, and KDP. The tool is completely anonymous for one free code every 24 hours, or you can register for five free codes daily. For power users, subscription plans unlock bulk generation up to 10,000 codes at once, with export options to CSV, PNG sheets, PDF, SVG, or EPS. UPCgen is also honest about when you need a real GS1 number, so you never accidentally use a barcode that collides with registered products. With dedicated generators for each barcode type, platform-specific step-by-step guides, and a developer API for integration, UPCgen has become the go-to resource for over 50 platforms and thousands of businesses worldwide. It is designed by mamar.ca and is carbon neutral.

GS1 Validated Check Digits

Every barcode generated by UPCgen includes a fully validated check digit that passes GS1 standard validation. This means your codes are mathematically correct and will scan reliably across all retail, warehouse, and fulfillment systems. No more worrying about rejected listings or scanning failures at checkout. The validation happens automatically in the background, so you get a perfect code every time without any manual calculation or error checking.

Platform Approved for Major Marketplaces

UPCgen codes are specifically designed to meet the strict requirements of Amazon, Shopify, Etsy, eBay, Walmart, and Amazon KDP supplier portals. Whether you are printing FNSKU labels for FBA, adding GTINs to Shopify listings, or generating ISBN barcodes for KDP books, these codes are accepted without issues. The platform provides step-by-step guides for each marketplace, so you know exactly how to add your barcode to your listings.

Bulk Generation with Professional Export

Generate 1 barcode or up to 10,000 at once with the bulk generation feature. Export your codes as CSV files for inventory management, PNG sheets for label printing, PDF for professional documents, SVG for scalable vector graphics, or EPS for high-resolution print production. This feature is a lifesaver for warehouses, 3PLs, and publishers who need to label hundreds or thousands of products quickly and consistently.

Anonymous and Registered Tiers

Start generating barcodes immediately with no signup required. The anonymous tier gives you one free code every 24 hours, perfect for testing or occasional use. Register for free to unlock five codes every 24 hours, with no credit card needed. For heavy users, subscription plans remove daily limits and unlock bulk generation, API access, and priority support. This flexible approach ensures everyone from hobbyists to enterprise teams can find the right plan.

Amazon FBA Sellers Printing FNSKU Labels

Amazon FBA sellers rely on UPCgen to generate FNSKU barcodes for their inventory. These labels are essential for sending products to Amazon fulfillment centers, where they are scanned, stored, and shipped to customers. With UPCgen, sellers can generate a single FNSKU or thousands at once, export them as printable PNG sheets, and stick them on their products. The codes are platform-approved, so there is no risk of rejection during the inbound shipment process.

Shopify and Etsy Sellers Adding GTINs to Listings

Ecommerce sellers on Shopify and Etsy need valid GTINs (Global Trade Item Numbers) to list products in categories like books, music, and electronics. UPCgen generates UPC-A and EAN-13 barcodes that serve as GTINs, ensuring your listings are compliant with marketplace requirements. The step-by-step guides show exactly where to enter the barcode in your Shopify or Etsy product page, saving you hours of research and guesswork.

Warehouses and 3PLs Labeling Outer Cases with ITF-14

Warehouse operators and third-party logistics providers use ITF-14 barcodes to label outer cases and pallets for shipping and receiving. UPCgen generates valid ITF-14 codes with the correct check digit and structure, so your cartons scan accurately through supply chain systems. The bulk generation feature lets you create hundreds of case labels at once, and the PDF or EPS export options ensure professional, durable labels for your warehouse environment.

Self-Publishers Generating ISBN Barcodes for KDP

Self-publishers on Amazon KDP need ISBN barcodes for their book covers. UPCgen generates valid ISBN barcodes that meet KDP's specifications, including the correct check digit and format. You can download the barcode as a high-resolution PNG or EPS file and add it directly to your book cover design. The platform also provides guidance on where to place the barcode on your cover and how to ensure it scans properly at retail.

Is UPCgen really free?

Yes, UPCgen offers a completely free tier that requires no signup and gives you one barcode every 24 hours. If you register for a free account, you get five barcodes every 24 hours. For users who need more, subscription plans are available that remove daily limits and unlock bulk generation, API access, and priority support. There are no hidden fees or surprise charges.

Are the barcodes generated by UPCgen valid for commercial use?

The barcodes generated by UPCgen are technically valid, meaning they have correct check digits and pass GS1 validation. However, UPCgen is transparent about the fact that for real commercial use, especially on major marketplaces like Amazon and Walmart, you need a genuine GS1 company prefix that is registered to your brand. UPCgen never pretends to issue "free" UPCs that could collide with registered products. Use the tool for internal tracking, testing, or as a placeholder, and purchase real GS1 numbers for final commercial listings.

Can I generate barcodes in bulk on UPCgen?

Yes, the bulk generation feature is available on paid subscription plans. You can generate up to 10,000 barcodes at once and export them as CSV, PNG sheets, PDF, SVG, or EPS. This is ideal for warehouses, publishers, and sellers who need to label large inventories quickly. The bulk tool handles all the validation and formatting automatically, so you get a perfect batch every time.

What barcode formats does UPCgen support?

UPCgen supports a wide range of barcode formats including 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 with specific options and settings. This covers everything from retail product barcodes to warehouse case labels to pharmaceutical Data Matrix codes for DSCSA compliance. If you are unsure which format you need, take the 30-second quiz on the homepage.

UPCgen offers three tiers: Free (anonymous, 1 code per day), Free Registered (5 codes per day with free account), and Paid Subscription (unlimited codes, bulk generation up to 10,000, API access, priority support). Exact subscription pricing is available on the pricing page of the website.