UPCgen Review: Bulk Barcode Generation for Amazon, Shopify, and Retail Sellers
UPCgen generates GS1-validated barcodes in nine formats including UPC-A, EAN-13, FNSKU, and Data Matrix, with bulk export up to 10,000 codes at once in PNG, SVG, PDF, EPS, and CSV. Here is who it is built for.
Getting a barcode should not require downloading software, signing up for a subscription, or decoding documentation. UPCgen is a web-based barcode generator that validates and renders codes across nine formats. Single codes or batches of up to 10,000 at once, exported to PNG sheets, SVG, PDF, EPS, or CSV. No install, no wait.
What UPCgen Does
UPCgen generates barcodes in nine formats: UPC-A, EAN-13, EAN-8, UPC-E, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. Every code goes through GS1 standard validation, meaning each one has a correct check digit and will pass scanner verification. You are not just getting a picture of numbers.
The bulk generation feature is where UPCgen goes beyond what most free barcode tools offer. You can generate up to 10,000 barcodes in a single batch and export them in formats ready for different workflows: PNG sheets for print, SVG and EPS for design tools, PDF for label printing, and CSV for inventory systems.
Who It Is Built For
Amazon FBA sellers are one of the clearest use cases. FNSKU barcodes are Amazon's internal tracking format, and generating them one at a time through Seller Central adds friction that compounds quickly when you are managing dozens of SKUs. UPCgen handles FNSKU generation directly and in bulk.
Multi-channel sellers on Shopify, Etsy, eBay, and Walmart who need UPC-A or EAN-13 codes for product listings. Each of these platforms has its own barcode requirements, and UPCgen provides platform-specific step-by-step guides alongside the generator itself, so you know exactly what format to use and where.
Publishers and KDP authors who need ISBN barcodes for book covers. UPCgen supports the ISBN format correctly, including the encoding rules specific to book publishing.
Warehouses and logistics operations that use ITF-14 for case packs and shipping containers, or Code 128 for internal shipment and order management labels.
The Nine Formats
- UPC-A - the standard 12-digit retail barcode used across North America
- EAN-13 - the 13-digit international equivalent, required for most non-US markets
- EAN-8 - compact version for small packaging where a full EAN-13 does not fit
- UPC-E - compressed UPC for small product packaging
- ISBN - book identification in barcode form, used in publishing and retail
- ITF-14 - outer case and shipping container format used in warehouse logistics
- Code 128 - high-density linear format for shipping labels and order management
- FNSKU - Amazon FBA inventory label format
- Data Matrix - 2D matrix format for small parts, pharmaceutical packaging, and electronics
Pricing
UPCgen has a free tier with limits and a paid tier for unlimited generation. Anonymous users can generate one barcode per 24 hours. Registered free accounts get five per day. The paid subscription removes all limits, enabling the bulk export features. You can start generating immediately without an account if you just need a code quickly.
Bottom Line
If you sell on Amazon, Shopify, Etsy, eBay, or Walmart, or if you manage physical inventory across multiple SKUs, barcode generation is a recurring task. UPCgen handles every format you will encounter across those channels, validates each code against GS1 standards, and lets you export in bulk without switching tools. For anyone generating more than a handful of codes, the bulk export alone is worth it.
Frequently Asked Questions
Is UPCgen free to use?
UPCgen has a free tier. Anonymous users can generate one barcode per 24 hours. Registered free accounts get five per day. Unlimited generation and bulk export require a paid subscription.
What barcode formats does UPCgen support?
UPCgen supports nine formats: UPC-A, EAN-13, EAN-8, UPC-E, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix. These cover retail, publishing, Amazon FBA, warehouse logistics, and small-part tracking.
Can I generate FNSKU barcodes for Amazon FBA with UPCgen?
Yes. UPCgen generates FNSKU barcodes that meet Amazon FBA labeling requirements. Enter your FNSKU from Seller Central and export for printing.
How many barcodes can I generate at once?
UPCgen supports bulk generation of up to 10,000 barcodes in a single batch on the paid plan. Exports are available in PNG sheets, SVG, PDF, EPS, and CSV formats.
Are the barcodes GS1 validated?
Yes. Every code generated by UPCgen passes GS1 standard validation with a correct check digit. Note that having a valid UPC-A barcode is separate from owning a GS1-registered prefix. If you need a GS1-registered UPC for major retail distribution, you will need to purchase a GS1 prefix separately.