Best tools to auto-generate product descriptions in bulk

"Auto-generate product descriptions in bulk" sounds like a single button. In practice it's two separate problems: getting an AI to write a decent description at all, and getting that process to run across hundreds of SKUs without you copy-pasting into an admin panel five hundred times. Shopify's own free tool solves the first problem well. It doesn't solve the second — and knowing that distinction up front saves a lot of wasted afternoons.

What Shopify Magic actually does

1. It's free on every plan: Shopify Magic ships as part of the core admin, regardless of subscription tier — there's no upsell required to use the AI description writer itself.

2. It works from a prompt, one product at a time: you give it a product title and, ideally, at least two features or keywords (materials, fit, target customer, brand voice terms), and it drafts a description in the product editor. It's a desktop-only feature — Shopify's docs note text generation isn't supported on the iPhone or Android admin apps.

3. For a real catalog, bulk means export-generate-reimport, or a dedicated app: Shopify's own docs don't describe a native way to run Magic across many products at once. The two realistic paths are: export your catalog to CSV, generate descriptions in batch through a bulk-editing tool, and re-import; or install one of the dedicated bulk-description apps from the Shopify App Store built for exactly this (several wrap ChatGPT with a batch interface over your whole catalog).

# Build one well-formed prompt per row of an exported product CSV,
# following Shopify's own guidance: title + at least 2 features/keywords.
import csv

def build_prompt(title: str, features: list[str], tone: str = "concise, benefit-led") -> str:
    if len(features) < 2:
        raise ValueError(f"'{title}' only has {len(features)} feature(s) — add more before generating")
    return (
        f"Write a product description for '{title}'. "
        f"Key features/keywords: {', '.join(features)}. "
        f"Tone: {tone}. Do not invent features or claims not listed above."
    )

with open("products_export.csv") as f:
    for row in csv.DictReader(f):
        prompt = build_prompt(row["Title"], row["Features"].split("|"))
        # Send 'prompt' to your generation tool of choice, then write the
        # result back to a "Body (HTML)" column for re-import.

Whichever path you pick, the failure mode is the same one Shopify itself flags: generated text can state a benefit or spec you never actually gave it. That's fine to catch on one product in the admin editor — it's easy to miss across four hundred CSV rows re-imported in one batch. Spot-check a sample against the real product before you publish a whole run, not just the first few.