ZeroKeeper — Free UPC Zero Padding Tool for Amazon Sellers | Stuntools
Built with 🖤 for Amazon FBA Sellers. Want more free tools like a Profit Calculator or Fee Analyzer? Check out the full suite at Stuntools.com
How to Use
- 1.Paste your UPCs in the text area (one per line or comma-separated)
- 2.Select your target length (12 for UPC-A, 14 for GTIN-14)
- 3.Click 'Pad Zeros' to restore leading zeros
- 4.Copy all or download as .txt for your Amazon inventory file
Example Input
12345678901
98765432101234
Expected Output
012345678901 (fixed, 1 zero added)
98765432101234 (already 14 digits, over-length warning)