📊Barcode Generator

Print-ready barcodes for product labels

Every retail product, warehouse shelf and Amazon shipment needs a barcode, and the file has to be right: correct symbology, correct check digit, and enough resolution that a scanner reads it first time. The Barcode Generator draws EAN-13, EAN-8, UPC-A, UPC-E, Code 128, Code 39, ITF-14, ISBN-13, MSI and Pharmacode barcodes from the number you type, calculates the check digit for you, and exports PNG or SVG at label resolution.

How it works

1. Pick the symbology. The tool tells you how many digits or characters it expects and which are allowed; EAN-13 wants 12 digits plus a check digit, UPC-A 11 plus one, ITF-14 13 plus one, while Code 128 and Code 39 take letters and numbers.
2. Type the value. The check digit is computed and appended automatically, or verified if you paste a full 13-digit code, so a typo is flagged before printing.
3. Set bar width (the X dimension), height, quiet zone, whether to print the human-readable digits underneath, and colours.
4. Check the live preview and the size readout in millimetres at your chosen DPI.
5. Download PNG (with DPI set for 300 or 600) or SVG for label software and printers.

Why it matters

• A GTIN is issued, not invented. EAN-13 and UPC-A numbers come from GS1; Amazon checks new listings against the GS1 database and rejects codes bought from resellers. This tool draws the bars for a number you already own.
• GS1 specifies the EAN-13 nominal size as 37.29 mm wide by 25.93 mm tall at 100% magnification, with 80% to 200% permitted. Below 80% many retail scanners fail.
• Amazon FBA labels are Code 128 encoding the FNSKU, printed at a minimum of 300 DPI; the Shopify and Daraz product forms both accept the same EAN or UPC in their barcode field.
• Cartons use ITF-14: 14 digits, thick bearer bars, readable on corrugated board. Books use ISBN-13, which is simply an EAN-13 starting with 978 or 979.

Tips

• Never scale a PNG barcode in a label editor; export at the size and DPI you will print, or use SVG.
• Black bars on white. Coloured or reversed barcodes scan poorly, and red bars are invisible to many laser scanners.
• Leave the quiet zone at the default. A barcode printed right up to an edge or across a fold will not read.
• Test with a phone scanner app and, if you can, a real retail scanner before printing a thousand labels.
• For a sheet of SKU codes from a spreadsheet, use Bulk QR / Barcode from CSV. Lay out a page of labels with Image to PDF / PDF to Images, add a SALE badge or price tag with the Meme / Label Maker, and for links rather than product IDs use the QR Code Generator.

Privacy

Your images never leave your browser. Bars, check digits and exports are all generated on your own device; your GTINs and SKUs are not sent to any server or stored anywhere.