Restore leading zeros on UPC/EAN codes mangled by Excel — free preview, one-time unlock
About UPC Leading Zero Fix
Browser-side CSV tool that fixes Amazon, Shopify, and seller catalog UPCs that lost leading zeros when opened in Excel. Preview the first rows free; pay once to download the fixed file. Processing stays in your browser — no file upload to our servers. Includes Amazon, Shopify, and Japanese seller variants.
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