Which symbology should I use?

CODE128 is the safe default for arbitrary alphanumeric data. Use EAN/UPC for retail, ITF for shipping cartons.

Why does my EAN-13 fail to render?

EAN-13 requires exactly 12 or 13 digits, including a valid check digit.

Which symbology should I pick?

CODE128 for general alphanumeric use such as internal SKUs and logistics. EAN-13 or UPC-A only for retail products with an officially issued number. ITF for cartons and outer packaging.

Why is my EAN-13 input rejected?

EAN-13 requires exactly twelve or thirteen digits, and the final digit is a checksum computed from the others. If you supply thirteen digits with a mismatched check digit, the code would be unscannable, so the tool refuses it.

Can I print these directly onto labels?

Yes. Download the image and place it in your label template, keeping the white quiet zone on both sides intact and avoiding any scaling that distorts the bar widths. Always test-scan one printed label first.

Barcode Generator — CODE128, EAN, UPC & More

Generate barcodes in every common symbology, powered by JsBarcode. Download as PNG or SVG, tune size and text display, all in your browser.

Last updated: 2026-07-21 · Runs 100% in your browser

Value

Format

// What is the Barcode Generator?

The Barcode Generator renders one-dimensional barcodes in the common retail and logistics symbologies, including CODE128, EAN-13, UPC-A and ITF. Each symbology has its own rules about which characters are permitted and how many digits are required, and the generator validates your input against those rules before drawing, so an invalid EAN-13 is caught in the browser rather than at the label printer. Output is plain black on white with a quiet zone on either side, because scanners depend on high contrast and clear margins far more than on size. The barcode is drawn on a canvas inside your tab and downloaded directly, so product codes and internal SKUs never leave your machine.