How to create a barcode online (and print it correctly)

Start with the job, not the format list

Retail packaging usually needs EAN-13 or UPC-A. Shipping and warehouse SKUs often use Code 128. Tiny electronics marks lean toward Data Matrix. Consumer links belong on QR Codes.

Inkode’s free barcode generator lets you pick a format, paste a value, and download without signing up. Save to a workspace when you need history or bulk jobs.

Validate before you print

Checksum formats (EAN/UPC) fail at the scanner if the check digit is wrong. Prefer tools that auto-complete or flag invalid digits.

Keep quiet zones clear, use dark bars on a light background, and print at 100% scale — “fit to page” is a common cause of no-reads.

When to upgrade from one-off generation

If you generate from spreadsheets weekly, use bulk ZIP export or the signed-in import batch flow. Label sheets and templates reduce operator error on thermal printers.