UPC A Barcode Generator

Summary

Type an 11-digit product number and get a scannable UPC-A barcode with the check digit computed automatically.

How it works

1. Type an 11-digit product number into the input field.
2. The 12th check digit is calculated automatically using 3/1 weighting over the first 11 digits.
3. If you type all 12 digits, the tool verifies the check digit and flags a mismatch.
4. The barcode renders instantly with left/center/right guard bars and human-readable digits below.
5. Click "Download PNG" to save the barcode image to your device.

Use cases

• Generate a UPC-A barcode for a new retail product before it ships to a store.
• Verify the check digit on an existing UPC-A number.
• Create barcode mockups for packaging design review.
• Produce barcodes for small-batch or private-label products.
• Test point-of-sale or inventory software with known UPC-A codes.
• Teach how the UPC-A check digit algorithm works.

Frequently Asked Questions