A free fixed-data demo is now available on the product page. Try ten fictional sample items before buying; the full version costs $19.

I made CSV Price Check, a small offline tool for reviewing price-list updates.

Load your current store export and a file of intended new selling prices. It matches exact SKUs, flags duplicates, blank/zero prices and large changes, and exports only the existing-product price changes you approve.

The files stay in your browser. A demo, example CSVs and quick-start guide are included. It creates a SKU/Regular price file for the documented WooCommerce mapping; actual store compatibility remains unverified, so use a backup and a small staging test. It does not calculate margin/tax, connect to a shop or update live prices. Original code was developed with generative AI assistance.

Details and sample screenshots: https://ithyme7.itch.io/csv-price-check