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Generate scannable barcodes for labels, inventory, assets and retail: Code 128 for arbitrary text (the logistics workhorse), EAN-13 and UPC-A for retail products, Code 39 for legacy systems. Check digits are computed automatically, invalid input is flagged before you print a sheet of duds, and the PNG downloads at print-friendly resolution.
Frequently asked questions
Which barcode type should I use?
Code 128 unless something forces otherwise — it encodes any text compactly and every scanner reads it. EAN-13/UPC-A only matter for retail checkout, and those numbers must be assigned by GS1, not invented.
Why does my 13th EAN digit differ from what I typed?
The last digit is a check digit computed from the first twelve — the generator calculates the correct one automatically. If you typed a full 13 and the last digit changed, your original check digit was wrong.
Can I just make up a barcode for my products?
For internal use (your own inventory, assets, shelf labels) — absolutely, use Code 128 with any scheme you like. For products sold through retailers, numbers must be licensed from GS1 so they're globally unique at checkout.