UPC / EAN Check Digit Calculator
Enter a barcode number (with or without the check digit) to compute or validate it. Supports UPC-A (12), EAN-13, EAN-8, and ITF-14 (14).
Runs entirely in your browser. Nothing is uploaded.
How it works
STEP 1
Choose the format
Select the barcode standard — UPC-A (12 digits), EAN-13, EAN-8, or ITF-14 (14 digits).
STEP 2
Enter the number
Paste the full barcode or just the payload without its check digit. The tool accepts both.
STEP 3
Compute or validate
Click Calculate to see the correct check digit. If you entered the full code, the tool tells you whether it is valid.