SKU Beacon is an independent browser-local checker for Shopify product CSVs. Review selected header, numeric, boolean, option and image-URL syntax findings, edit fields, and export a review copy with an audit log. CSV contents stay in your browser. The free public preview exports complete files with up to 100 data rows. No account or Shopify connection is required. It does not convert supplier files, check your live store or remote image availability, or guarantee Shopify import acceptance. Keep a backup and review changes before importing.