Bulk product description generator

Product descriptions for your
whole catalogue, in one run

Stop writing descriptions one product at a time. Upload your catalogue as a spreadsheet, set your brand voice once, and PromptMax writes a unique description for every SKU — using the AI model you choose.

Get started free →
No code · Works with any CSV export · Start with free credit, no card needed
Who it's for

If your catalogue is bigger than your copy team

Writing a unique, on-brand description for every SKU is the e-commerce job that never ends. PromptMax is for the people staring down a full catalogue.

Online store owners

Launch or refresh a whole catalogue with consistent, on-brand copy — without hiring it out by the hour.

E-commerce agencies

Turn around descriptions for client stores in bulk, with each brand's voice applied row by row.

Marketplace & dropship sellers

Replace thin, duplicate supplier copy with unique descriptions across thousands of listings.

The difference

From a product feed to finished copy

You set the brand voice once — "40–60 words, benefit-led, confident tone" — and it's applied to every product. A few real rows:

Your catalogue → AI responses (appended)
Product row in your fileDescription (out)
Cairn Ultralight Down Jacket — 650-fill, 280g, packable, water-resistant Pack warmth without the weight. 650-fill down traps heat at just 280g, then stuffs into its own pocket when the sun comes out — water-resistant for the surprise shower.
Ridgeline Trail Shoe — 320g, 6mm drop, rock plate, grippy lugs Built for the long way round. At 320g with a protective rock plate and aggressive lugs, the Ridgeline keeps you sure-footed on technical trails without weighing you down.
Northpeak 45L Backpack — rain cover, ventilated back, hip-belt pockets Everything for the weekend, nothing on your back you'll regret. 45L of organised space, a ventilated back panel for sweaty climbs, and a rain cover for when the sky turns.
Your output keeps every original column, with the description added. (Sample illustration — run your own catalogue free on the first 10 rows.)
Why not just…

The alternatives, and where they break

By hand, or one ChatGPT chat at a time

  • Minutes per product — weeks for a full catalogue
  • Brand voice drifts product to product
  • Copy-paste errors and skipped SKUs
  • Supplier copy stays thin and duplicated

PromptMax

  • Your whole catalogue in one run, up to 50,000 rows
  • One brand voice applied to every product
  • A finished spreadsheet, ready to import to your store
  • Re-run any time products or tone change
How it works

Three steps, no code

1

Export your catalogue

Download your products as a CSV from Shopify, WooCommerce or any platform — name, attributes, category per row.

2

Set your brand voice once

Describe your tone, length and what to emphasise in plain language. It is applied to every product consistently.

3

Run the batch job

Pick a model, test the first 10 rows free, then run the whole catalogue. Download a spreadsheet with every description written.

Why PromptMax

Built for whole-catalogue copy

One voice, every product

Apply the same brand voice consistently across 50 products or 50,000 — no copy-pasting into a chatbot one at a time.

14 models to choose from

Gemini, Claude, GPT and Grok in one place. Test the first 10 rows free and compare before you commit.

25% cheaper than standard APIs

We pass the batch discount straight to you, and you pay only for what you process. No plans, no seats.

Your data stays private

Your files are isolated to your account, never shared with other users, and never used to train AI models.

Questions

Good to know

What does my spreadsheet need to contain?
One row per product. A product name plus key attributes (materials, size, features) and a category work well — but include any columns you like. Your prompt decides what the model uses.
Does it work with Shopify or WooCommerce?
Yes. Export your products to CSV from any platform, process them in PromptMax, and import the results back. The output keeps all your original columns.
Can I control tone and length?
Yes — your prompt sets the rules: tone of voice, length, what to emphasise, keywords to include. Test the first 10 rows free to fine-tune before running the full catalogue.
How is pricing calculated?
Pay as you go, based on what you process, at roughly 25% below standard API pricing. New accounts start with free credit and no card is required.
Related guide

Want the full walkthrough? Read How to write product descriptions at scale with AI.

Write your whole catalogue at once

Set your brand voice once. Let PromptMax handle every product.

Get started free →
Start with free credit · No card needed