Free tool · E-commerce
Product description generator
Paste a product's facts and get a description for your store, Amazon or Etsy, with every spec kept exactly: 1 free run a day on GPT-6 Luna, no account needed. It adds no claims your facts don't support.
1 free run a day, no account needed
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Test runs checked . Updated .
Product description generator: three examples
Three inputs and the description a free run gave each, made once on September 28, 2026 with GPT-6 Luna and shown as it came back. The example buttons in the box above show the same.
Stainless steel water bottle, 750 ml, double-walled, keeps drinks cold 24 hours and hot 12 hours, bamboo cap, weighs 380 g, dishwasher-safe body (hand-wash the cap). Comes in sage, sand and charcoal.
Get a 750 ml stainless steel water bottle with a bamboo cap. Its double-walled design keeps drinks cold 24 hours and hot 12 hours. The body is dishwasher-safe; hand-wash the cap. Weighs 380 g and comes in sage, sand and charcoal. - Material: Stainless steel - Capacity: 750 ml - Double-walled - Bamboo cap - Care: Dishwasher-safe body (hand-wash the cap)
Unisex organic cotton T-shirt, 180 gsm, relaxed fit, sizes XS–XXL, printed in Portugal with water-based inks. Design: a line drawing of the Lisbon tram 28. Machine wash cold, inside out.
Unisex Organic Cotton T-Shirt with Lisbon Tram 28 Line Drawing, 180 gsm, Relaxed Fit, Sizes XS–XXL - LISBON-INSPIRED DESIGN: Features a line drawing of the Lisbon tram 28. - ORGANIC COTTON: Unisex T-shirt made from organic cotton. - RELAXED FIT: Designed with a relaxed fit. - 180 GSM FABRIC: Made in 180 gsm fabric. - PRINTED IN PORTUGAL: Printed in Portugal with water-based inks; machine wash cold, inside out.
Hand-poured soy candle, 220 g, fig and cedar scent, cotton wick, about 45 hours burn time, reusable amber glass jar. Made in small batches in Bristol.
Bring home a hand-poured soy candle with a fig and cedar scent, poured in small batches in Bristol. It comes in a reusable amber glass jar with a cotton wick, offering about 45 hours burn time. Materials: Soy wax, cotton wick, amber glass jar Size: 220 g Care: Not provided
Which AI model is best at this? We tested every one
Every one of the 17 models we ran passed all 5 of our Product description generator test inputs, so choose on speed and price: GLM 5.3 was quickest, at 0.8 s a run on average. GPT-6 Luna, the model a free run is on, took 3.4 s.
Run on September 29, 2026: 5 inputs on 17 models, each with this tool's own instructions.
| Model | Passed | Hard ones | Messages used on Pro | Cost per run | Time per run |
|---|---|---|---|---|---|
| GPT-6 LunaOpenAIThe free run's model | 5 of 5 | 2 of 2 | 1 each, of 60 a day on Pro | $0.0001 | 3.4 s |
| GLM 5.3 FlashZ.ai | 5 of 5 | 2 of 2 | 1 each, of 60 a day on Pro | $0.0001 | 3.1 s |
| DeepSeek V4.1 FlashDeepSeek | 5 of 5 | 2 of 2 | 1 each, of 60 a day on Pro | $0.0006 | 1.4 s |
| Gemini 3.8 FlashGoogle | 5 of 5 | 2 of 2 | 1 each, of 250 a month on Pro | $0.0005 | 1.8 s |
| GLM 5.3Z.ai | 5 of 5 | 2 of 2 | 1 each, of 250 a month on Pro | $0.0007 | 0.8 s |
| Claude Haiku 4.5Anthropic | 5 of 5 | 2 of 2 | 1 each, of 250 a month on Pro | $0.0011 | 2.3 s |
| DeepSeek V4 ProDeepSeek | 5 of 5 | 2 of 2 | 1 each, of 250 a month on Pro | $0.0042 | 15.1 s |
| Grok 4.7xAI | 5 of 5 | 2 of 2 | 1 each, of 250 a month on Pro | $0.0068 | 13.8 s |
| GPT-6.1 SolOpenAI | 5 of 5 | 2 of 2 | 1 each, of 125 a month on Pro | $0.0010 | 2.7 s |
| Kimi K3Moonshot | 5 of 5 | 2 of 2 | 1 each, of 125 a month on Pro | $0.0020 | 4.0 s |
| GPT-6 SolOpenAI | 5 of 5 | 2 of 2 | 1 each, of 125 a month on Pro | $0.0022 | 5.8 s |
| Claude Sonnet 5Anthropic | 5 of 5 | 2 of 2 | 1 each, of 125 a month on Pro | $0.0028 | 2.8 s |
| Claude Sonnet 5.5Anthropic | 5 of 5 | 2 of 2 | 1 each, of 125 a month on Pro | $0.0030 | 2.6 s |
| Gemini 3.1 Pro (preview)Google | 5 of 5 | 2 of 2 | 1 each, of 125 a month on Pro | $0.0057 | 8.3 s |
| Claude Opus 5.5Anthropic | 5 of 5 | 2 of 2 | 1 each, of 62 a month on Pro | $0.0136 | 6.5 s |
| GPT-6 AstraOpenAI | 5 of 5 | 2 of 2 | 1 each, of 31 a month on Pro | $0.0039 | 6.0 s |
| Claude Fable 5.1Anthropic | 5 of 5 | 2 of 2 | 1 each, of 31 a month on Pro | $0.0155 | 4.1 s |
Side by side: no claims beyond the facts
The same input on GPT-6 Luna and GLM 5.3 Flash, as each answered it, unedited.
Write a product description from these facts. Keep every spec exact, add no claims the facts don't support, and lead with what the buyer gets. --- Bamboo cutting board, 40 by 28 cm and 2 cm thick, with a juice groove. Hand wash only; not dishwasher-safe.
Get a bamboo cutting board measuring 40 by 28 cm and 2 cm thick, with a juice groove. - Material: Bamboo - Size: 40 by 28 cm - Thickness: 2 cm - Care: Hand wash only; not dishwasher-safe.
Bamboo cutting board with juice groove, 40 by 28 cm and 2 cm thick — a roomy surface for chopping, slicing and prepping, with a groove that catches juices as you cut. Hand wash only; not dishwasher-safe. - Generous 40 by 28 cm work surface for everyday prep - 2 cm thick bamboo construction - Built-in juice groove to help keep counters tidy - Hand wash only; not dishwasher-safe
How the inputs are scored
- Key facts: the answer must state each fact the input turns on (a number, a name, a date or a condition), as the input gives it, keep any format rule the input sets (one sentence, a word limit, a number of items, a length for each), and say nothing the input rules out (an ingredient, a claim it doesn't back); how it's worded isn't judged.
The inputs: a coffee dripper, amazon bullets, an etsy listing, no claims beyond the facts, and upscale, with every spec. Every model gets the tool's own instructions and up to Pro's reply limit. The method is the same as our other test runs.
How to use the Product description generator
Paste the product's facts: what it is, sizes, materials, specs, care, who it's for. Up to 1,000 characters.
Pick the platform, the tone and the language.
Press “Write the description”. Without an account you see how it opens (1 free run a day, no account needed).
Check each spec against your listing before you publish.
Tips for a better answer
Paste all the specs
Give it every spec you have. It can leave facts out; it won't make them up, so a thin input gives a thin description.
Name the buyer
Say who it's for (“for commuters”, “for new parents”) and the benefits are written for them.
Front-load the bullets
For Amazon, the first five words of each bullet do most of the work in search and on mobile.
One listing, many languages
Selling in more than one country? Signed in, ask the chat for the same listing in each language, specs unchanged.
What a good description looks like
Every spec exact
Sizes, materials, weights and capacities should match your listing exactly. A description that turns 1.1 kg into “lightweight, around 1 kg” invites returns.
No invented claims
No claim your facts don't support: not waterproof if it's water-resistant, not “best-selling” unless it is. On most marketplaces, those claims can get a listing removed.
Benefits first
Lead with what the buyer gets (“keeps coffee hot for 12 hours”), then the spec that proves it. Features tell, benefits sell.
Fits the platform
Amazon wants short bullets that start with the benefit; Shopify and Etsy read best as a short paragraph with a line on care or sizing.
What's free, and what signing up adds
Without an account: 1 free run a day, on GPT-6 Luna, shared with the free message on our home page. It takes up to 1,000 characters, writes up to about 600 tokens (roughly 450 words), and shows you the start of the description.
Signing up is free, with an email link and no card. llmwise accounts are for people 18 and older. The description you ran comes with you as your first chat, and you get 5 free messages on almost every model (all but Claude Fable 5.1, Claude Opus 5.5, and GPT-6 Astra).
Signed in, the tool runs on the model you pick, on your plan, shows the whole answer, and you can carry on in the chat with any model, or ask another model the same thing.
More free tools are on the tools page, and what each plan gives is on pricing.
Questions
Is the product description generator free?
Yes. Without an account you get 1 run a day on GPT-6 Luna, shared with the free message on our home page: you see the start of the description, and the rest when you sign up. Signing up is free and adds 5 free messages on almost every model in llmwise (all but Claude Fable 5.1, Claude Opus 5.5, and GPT-6 Astra), with no card.
Which platforms does it write for?
Your own store (Shopify, WooCommerce: a short paragraph and key features), Amazon (a title idea and five bullets) and Etsy (a warm listing with materials and care). Pick one.
Will it add features my product doesn't have?
No. It only uses the facts you give. If you want a claim in (a certification, “bestseller”), put it in the facts; if you can't prove it, leave it out.
Does it work for clothing descriptions?
It works well for clothing: give the fabric, weight, fit, sizes and care, and it writes the fit and feel buyers look for.
Which AI writes the best product descriptions?
Our test runs below gave every model the same five products and checked that every spec survived exactly and no model added a claim the facts didn't support.
Which AI is best for this, in your tests?
Every one of the 17 models we ran passed all 5 of our Product description generator test inputs, so choose on speed and price: GLM 5.3 was quickest, at 0.8 s a run on average. GPT-6 Luna, the model a free run is on, took 3.4 s. The table on this page has every model's result, what a run counts as on Pro, and the time it took.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, in one chat.
See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.