Validate GTINs, generate barcodes, calculate check digits and parse GS1 element strings — all in your browser. No account, no limits, no watermark.
Upload the Transparency codes Amazon issued for your ASIN and get print-ready label artwork at true physical size — laid out as an A4 sheet, or one label per page for a thermal printer's pre-cut roll. Download the PDF for free, or skip printing altogether and have the run produced and couriered to you.
Paste a GTIN, EAN-13, UPC-A or ITF-14 and find out immediately whether the check digit is correct and the structure is valid. Useful before you send numbers to a retailer or marketplace, where an invalid barcode usually means a rejected listing.
Paste a whole column from a spreadsheet and validate the lot in one pass, with the invalid rows called out. Built for catalogue clean-ups, where checking numbers one at a time is not realistic.
Generate a print-ready barcode from a number you already own and download it as SVG or PNG. Vector output matters here: a rescaled bitmap barcode is the usual reason a code scans on screen but fails at the till.
Enter the base number and get its GS1 Mod-10 check digit, along with the arithmetic behind it. The working is shown so you can verify a supplier's number rather than take it on trust.
Convert a number between GTIN-8, GTIN-12 (UPC-A), GTIN-13 (EAN-13) and GTIN-14 without hand-padding zeros. Handy when a trading partner asks for the 14-digit form of a barcode you hold as a 12- or 13-digit number.
Check a raw GS1 element string or Digital Link URI and see how it parses: which application identifiers are present, what each one contains, and where it is malformed. The quickest way to debug a code that scans but is rejected downstream.
Work out the registration and annual fees for a GS1 company prefix based on the number of barcodes you need, before you commit. Useful for deciding which prefix size to apply for rather than discovering the cost afterwards.
These tools check numbers. A free TrueGTIN account issues unique, serialized QR codes for every unit you make — printed on the equipment you already own.