Build a BigCommerce upload CSV
Upload a manufacturer price sheet, a URL Lists workbook, and optional spec PDFs. Configure a reusable profile, review the result, and export a deterministic 81-column CSV.
Deterministic
RFC-4180 CSV writer, value-only, no formulas. Forbidden-cell matrix enforced.
Profile-driven
Per-brand column maps, grouping rules, variant options. Reusable across runs.
Validated
Hard errors block export. Warnings (unmatched assets, image overflow) flagged.