UPCgen

UPCgen is a free online barcode generator designed for simplicity and accuracy. It provides a straightforward tool for creating valid barcodes including UPC, EAN, ISBN, GTIN, ITF-14, Code 128, FNSKU, and Data Matrix formats. The core purpose of UPCgen is to eliminate the confusion and bloat found in other barcode tools. Many existing solutions are either overly complex software packages, present a confusing array of unnecessary options, or misleadingly offer "free" UPC numbers that can conflict with officially registered products. UPCgen was built on a principle of honesty and clarity. It offers a clean, single-purpose page where a user can select the correct barcode type, enter a number, and generate a valid, downloadable code in seconds. The tool is for anyone who needs a usable barcode, from individual sellers on Amazon and Shopify to warehouse operators and publishers. UPCgen validates every code it generates, ensuring the check digit is correct and the format meets GS1 standards. This makes the codes platform-approved for major marketplaces like Amazon, Shopify, Etsy, eBay, and Walmart. The service is anonymous for basic use and offers free registration for increased daily generation limits. For high-volume needs, subscription plans provide batch generation and API access. UPCgen is a foundational resource that educates users on the difference between a generated code and a purchased, registered GS1 number, providing an honest and effective solution for barcode creation.

Valid Code Generation

Every barcode generated by UPCgen includes a mathematically correct check digit. The tool automatically calculates and appends this final digit to ensure the code passes GS1 standard validation. This means the barcode is structurally valid and can be read by any standard barcode scanner. This feature removes the guesswork and potential for errors that come with manual calculation, providing a reliable code every time.

Platform Approval

Codes created with UPCgen meet the technical requirements of the most popular ecommerce and retail platforms. This includes Amazon, Shopify, Etsy, eBay, and Walmart supplier portals. By adhering to GS1 formatting standards, the generated barcodes are accepted for product listings and inventory management. This feature saves sellers the time and frustration of having barcodes rejected by their chosen marketplace.

Bulk Generation and Export

UPCgen supports generating a single barcode or up to 10,000 at once. This bulk capability is essential for businesses managing large inventories. The generated codes can be exported in multiple professional file formats, including CSV, PNG sheets, PDF, SVG, and EPS. This flexibility allows users to integrate the barcodes directly into their label printing workflows, whether for individual products or large-scale warehouse operations.

Anonymous and Free Access

Users can generate a barcode without creating an account or providing any personal information. This anonymous access allows for one free code every 24 hours. For users who need to generate more codes, free registration increases the daily limit to five codes. This tiered access model ensures that casual users can get a single code quickly, while regular users have a clear, no-cost path to higher usage.

Amazon FBA Labeling

Amazon FBA sellers use UPCgen to generate FNSKU barcodes for their products. These labels are required for products that are not already mapped to an existing ASIN or when using the FBA (Fulfillment by Amazon) service. The tool allows sellers to quickly create the correct barcode format, print it on a label, and affix it to their inventory before sending it to Amazon warehouses, ensuring smooth receiving and tracking.

Ecommerce Product Listings

Shopify, Etsy, and eBay sellers need GTINs (Global Trade Item Numbers) like UPC or EAN to list products on their platforms. UPCgen provides a fast way to generate these barcodes for new products. Sellers can create the required code, download it as a high-resolution image, and upload it directly to their product listing. This process helps meet platform requirements and improves product discoverability in search results.

Warehouse and Logistics Labeling

Warehouses and third-party logistics (3PL) providers use ITF-14 barcodes to label outer cases and shipping cartons. UPCgen generates these codes, which encode the GTIN of the product inside the case along with the quantity. This allows for efficient scanning and tracking of pallets and bulk shipments. The bulk generation feature is particularly useful here, allowing a warehouse to create hundreds of case labels in a single batch operation.

Publishing and Book Sales

Self-publishers and authors use UPCgen to generate ISBN barcodes for their books. When selling on platforms like Amazon KDP (Kindle Direct Publishing) or through traditional retail channels, a barcode on the back cover is required. The tool provides the correct EAN barcode format derived from the ISBN number. This allows authors to create a professional, scannable barcode for their book cover without needing expensive design software.

What types of barcodes can I generate with UPCgen?

UPCgen supports a wide range of common barcode symbologies. You can generate UPC-A, UPC-E, EAN-13, EAN-8, ISBN, ITF-14, Code 128, FNSKU, and Data Matrix codes. This selection covers the needs of most ecommerce sellers, warehouse operators, publishers, and pharmaceutical companies. The tool also provides dedicated generators for each type to ensure the correct format is used.

Is the barcode generated by UPCgen a real, registered UPC number?

No. UPCgen generates a barcode with a valid check digit, but it does not assign a registered, globally unique GS1 Company Prefix. The codes are structurally valid and will scan correctly, but they are not officially registered in the GS1 database. For products that will be sold in major retail stores that require a registered UPC, you must purchase a genuine GS1 prefix. UPCgen is honest about this distinction and is designed for internal use, FNSKU labels, and platforms where a registered number is not required.

How many barcodes can I generate for free?

The free tier allows for anonymous generation of one barcode every 24 hours. If you register for a free account, you can generate up to five barcodes every 24 hours. For users who need to generate more codes, such as for bulk inventory labeling, paid subscription plans are available that offer higher daily limits and additional features like API access.

What file formats are available for downloading the barcode?

You can download your generated barcode in several professional file formats. The options include PNG for standard use, SVG for scalable vector graphics, EPS for print production, and PDF for document integration. For bulk generation, you can also export a CSV file containing the barcode numbers and a PDF or PNG sheet containing multiple barcodes arranged on a page for printing.