Which symbology should I pick?

Code128 for short alphanumeric labels (most general-purpose). EAN-13 for retail product barcodes. UPC-A for North American retail. Code39 for older industrial inventory systems.

Can I print directly?

Yes — download the SVG for vector printing at any size, or the PNG at 2x scale for raster output.

Is this distinct from /qrgen/?

Yes. QR codes are 2D matrix codes; barcodes are 1D line codes. They are not interchangeable — point-of-sale scanners use 1D codes; phones decode QR for URLs.

條碼產生器

產生 Code128、EAN-13、UPC-A 與 Code39 條碼,輸出為 SVG 或 PNG,完全在瀏覽器執行。

Symbology Bar height (px) Module width (px)

Data Show human-readable text below barcode

Symbology cheat sheet

Code128: alphanumeric + symbols, compact, the everyday workhorse. Max ~80 chars.
EAN-13: 13-digit retail standard outside North America (book ISBNs, EU retail).
UPC-A: 12-digit retail standard in the US and Canada. (Encoded internally as EAN-13 with leading zero.)
Code39: 1970s industrial standard; uppercase letters, digits, and a few symbols. Still common on inventory tags.

Common use cases

Inventory labels: Code128 for warehouse asset tags scanned by handheld readers.
Event tickets: Code128 with a UUID, printed on the ticket stub.
Retail products: EAN-13 or UPC-A on packaging.
Library / archives: Code39 for legacy shelf-management systems.

常見問題

Which symbology should I pick?: Code128 for short alphanumeric labels (most general-purpose). EAN-13 for retail product barcodes. UPC-A for North American retail. Code39 for older industrial inventory systems.
Can I print directly?: Yes — download the SVG for vector printing at any size, or the PNG at 2x scale for raster output.
Is this distinct from /qrgen/?: Yes. QR codes are 2D matrix codes; barcodes are 1D line codes. They are not interchangeable — point-of-sale scanners use 1D codes; phones decode QR for URLs.

Last updated: 2026-05-20 By jarvisbox