Free Barcode Generator
Type a number. Get a barcode. No upload. No signup. Works offline.
📋 Batch Generate (paste a list)
Free Online Barcode Generator
GenBarcode generates industry-standard barcodes directly in your browser. Your data never leaves your device — there's no server, no upload, and no tracking. Whether you're an Amazon seller printing UPC labels, a warehouse manager generating ITF-14 shipping barcodes, or a retailer creating EAN-13 product labels, you get instant, print-ready output.
Supported Barcode Types
EAN-13 — 13-digit international retail barcode used on products sold worldwide. GenBarcode auto-detects 13-digit input and generates a standard EAN-13 with check digit.
UPC-A — 12-digit barcode used in US/Canada retail. Enter 11 or 12 digits and the check digit is calculated automatically.
Code 128 — High-density alphanumeric barcode used in logistics, warehousing, and shipping. Supports letters and numbers of any length. GenBarcode auto-selects the optimal Code 128 encoding (B or C) for your data.
Why GenBarcode
- Instant preview — Barcode renders as you type, no "Generate" button needed
- Auto-detection — Type 12 digits and it knows you want UPC-A; 13 digits = EAN-13
- 300 DPI print-ready — PNGs are rendered at 1024×400px print resolution, not screen resolution
- True SVG vector — Scale to billboard size without quality loss. Most competitors charge for SVG export
- Works offline — This is a PWA. Once loaded, it works without internet. No data leaves your browser
- Quiet zone included — Proper margins for reliable scanning — the #1 thing most free generators get wrong
- Check digit auto-calculated — Enter 11 digits for UPC, 12 for EAN — the check digit fills in automatically
Built by Marcus Rivera, former Amazon warehouse operations manager. After five years of dealing with barcode systems that didn't work right, I built the tool I wished I had back then. More about me →