Copy.ai is built specifically for marketing copy tasks like this, and its batch workflows let you feed in multiple products and generate sales descriptions in one pass without repeating the process manually for each item. It has dedicated e-commerce templates that keep descriptions on-brand and conversion-focused. Jasper is a strong alternative if you need tighter brand voice controls and longer-form content alongside the short descriptions. Claude Haiku handles bulk text generation at low cost via API if you want to script the process programmatically across a large product catalog.