OpenCart exports have the same holes. You do not need an extension.

Blank product models, $0 prices, products with no image, two rows sharing a model. Export products and check the file in the browser.

Open the CSV check

How

1. OpenCart admin → Catalog → Products → Export (or an import/export extension that writes CSV).
2. Open csv-check.html and drop the file. Nothing is uploaded.
3. The checker treats model as the SKU, plus name, price, and image. Duplicate models are flagged.
4. Fix the SKUs that cannot sell. A ranked Monday list of 20 is the Store Audit (USD $149) — email the same CSV to info@shopgaps.com.

ShopGaps is not an OpenCart Marketplace extension and does not connect to your shop. PrestaShop notes: prestashop.html. WooCommerce merchants who want an on-site plugin can use Catalog Audit.