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UPC-A Barcode Generator with Check Digit

Generate Code 128, EAN-13, EAN-8, UPC-A and Code 39 barcodes with live validation and automatic check digits, downloadable as SVG or PNG.

Processing... 0%
Validating the value
Computing the check digit
Encoding bar patterns
Rendering the barcode

Result

This page opens the barcode generator with UPC-A already selected — enter the 11 digits of your product number and the tool computes and appends the 12th check digit for you.

UPC-A is the standard retail barcode in the United States and Canada: 12 digits total, structurally an EAN-13 that starts with 0. If a supplier gives you an 11-digit number, that is the payload without the check digit — this tool adds it and tells you which digit it appended.

Rendering happens locally in your browser as crisp SVG rectangles with the digits printed under the bars; download as SVG for print or PNG for documents and mockups.

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Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • Five symbologies: Code 128 (auto subset B/C), EAN-13, EAN-8, UPC-A and Code 39.
  • Live validation of allowed characters, length and check digit while you type.
  • Human-readable digits rendered under the bars, with proper quiet zones.
  • One-click download as SVG (vector) or PNG (raster, 3x scale).

Key Benefits

✓ Runs entirely in your browser: product codes and internal SKUs are never uploaded anywhere.
✓ Automatic check digits: enter 12 digits for EAN-13 and the tool computes and appends the 13th, telling you which digit it added.
✓ Vector output: the barcode is built as SVG rectangles, so it prints razor-sharp at any size — PNG export included for quick pasting.

Use Cases

  • • Print EAN-13 or UPC-A labels for products going to retail — enter the 12 (or 11) digits and let the tool compute and verify the check digit.
  • • Generate Code 128 barcodes for warehouse bins, asset tags and shipping paperwork that scanners must read reliably.
  • • Put an ISBN barcode (EAN-13 with the 978/979 prefix) on a book cover as crisp vector SVG that survives any print size.