Free product data tools

Small tools for sellers who work with UPCs, package sizes and weights. Nothing you enter leaves your browser.

• UPC check digit calculator

  Check if a UPC, EAN or GTIN is valid, or calculate the missing check digit.

• Fix UPCs that lost leading zeros

  Paste a column of UPCs from Excel and get the full 12-digit codes back.

• Centimeters and kilograms to inches and pounds

  Convert package size and weight to imperial units and get the dimensional weight.

• Bolt pattern converter

  Convert bolt patterns between millimeters and inches, like 5x114.3 and 5x4.5.