Products that arrived by CSV, migration or API have no category, and Shopify only suggests one while you create a product by hand. Catalog Butler reads the whole catalog, proposes a category for every product from the official taxonomy, shows you the entire change before a single word is written, applies it in bulk, and puts everything back with one click if you change your mind. Feed apps read this field; they never fill it. Fix it once and every feed inherits it.

• Built for real catalogs: 1,000 to 50,000 products in one reversible pass
• See what every product is missing before a single word is written
• Every category checked against the official taxonomy, never an invented value
• A short doubts queue: you decide only the products the AI was unsure about
• Also fills brand, type, tags, search text and photo alt text, only if empty