“I used to burn half my standup rewriting the same Claude ask. Now I dump the messy note and ship the prompt.”
AI prompt generator
Turn your idea
into a pro-level prompt
PromptEngine turns a rough idea into a clear, model-ready prompt for ChatGPT, Claude, Gemini, and Grok—so you get sharper results on the first try.
Works with
OpenAI
Claude
Gemini
Grok
Compatibility labels only — not affiliated with or endorsed by these companies.
The model isn’t confused. The ask is.
PromptEngine rebuilds your rough note into a prompt the model can actually execute.
What you type
raw“write a launch email for our new analytics dashboard”
- No audience or offer
- No length or CTA
- Model improvises — then you rewrite
reshape
↓ reshape
What the model gets
engineeredTask: B2B launch email for an analytics dashboard Audience: existing trial users Deliver: subject + preview + body Must include: 1 hook, 3 benefits, 1 clear CTA Tone: confident, concise, no hype
- Goal + format locked
- Audience & CTA set
- Paste once — use the answer
People who stopped wrestling the chat box
Composite stories inspired by common workflows — illustrative, not verified reviews.
“Debugging prompts were longer than the bug. PromptEngine forces the interface + edge cases up front.”
“Client decks used to open with ‘I’ll outline…’. Structured prompts made Gemini skip the speech and deliver slides.”
“Outreach emails used to sound generic. Now I get subject + body with a real CTA on the first pass.”
“We paste into Grok for research briefs. Constraints keep it from inventing sources.”
“Extension inside ChatGPT means I never context-switch. Rough draft → one click → send.”
How PromptEngine works
Three steps. No prompt-engineering course required.
-
1
Describe what you need
A short sentence is enough—email, code, plan, image prompt, anything.
-
2
Pick your AI
Choose ChatGPT, Claude, Gemini, or Grok. We shape the prompt for that model.
-
3
Copy and paste
Get a structured prompt, paste it into your AI, and use the better answer.
Prompt library
Ready-made prompts for ChatGPT, Claude & Gemini
A curated library of finished prompts you can open, edit, and copy—then paste into your AI. Start with free ones below; Pro unlocks the full collection and a saved shelf.
Creative
FreeCouncil of five minds
Five conflicting advisors debate your question—then hand you one experiment for the week.
Images
Free4-panel comic image prompts
Four image prompts that tell a silent story—paste into ChatGPT Images or Gemini.
B2B cold email that gets replies
Three short cold emails with subject, preview line, and one clear CTA—ready to adapt.
Use it inside ChatGPT, Claude & Gemini
Install the Chrome extension, type a rough idea in the chat box, and refine it in one click—no tab switching.
Free plan includes 3 prompts / week.
Simple pricing
Start free. Upgrade when you need more prompts and history.
Free
$0
3 prompts / week
- All four AI targets
- Chrome extension
- 150 free library prompts
Most popular
Pro
$9.99
/ mo
50 prompts / week · annual $89.99
- All four AI targets
- Full library + Saved shelf
- Full prompt history
Creator
$19.99
/ mo
Unlimited · annual $179.99
- Unlimited prompts
- Full library + Saved shelf
- Full prompt history
FAQ
Prompt generator, supported AIs, pricing, and the Chrome extension.
What is PromptEngine?
PromptEngine is an AI prompt generator and optimizer that turns rough ideas into structured, model-tuned prompts for ChatGPT, Claude, Gemini and Grok. It works as a web app and as a Chrome extension that runs inside the chat UIs of ChatGPT, Gemini and Claude.
Which AI models does PromptEngine support?
PromptEngine generates prompts tuned for four flagship conversational AIs: ChatGPT (OpenAI), Claude (Anthropic), Gemini (Google) and Grok (xAI). Each model gets its own prompt structure and tone — Claude prompts use XML blocks, ChatGPT prompts are execution-first, Gemini prompts emphasise deterministic formatting, and Grok prompts use a direct conversational style.
Is PromptEngine free?
Yes. The Free plan includes 3 prompts per week, all four target AIs, the Chrome extension, and 150 free library prompts (open, edit, copy). Pro unlocks the full library, a Saved shelf, 50 generates/week, and history. Creator is unlimited generation plus the same library features.
What is the PromptEngine prompt library?
A curated studio of prompts for ChatGPT, Claude, Gemini and Grok. Free members get 150 prompts with full open/edit/copy. Pro and Creator unlock the rest and can save favorites to a personal shelf on the library page.
How is PromptEngine different from writing prompts by hand?
PromptEngine analyses your raw input, infers your real objective, picks the right output format and rewrites your request with explicit constraints — "never fabricate", "acknowledge uncertainty", structured headings. The result is a model-tuned prompt that gives sharper, more consistent answers than ad-hoc prompting, with none of the trial-and-error.
Does PromptEngine work inside ChatGPT?
Yes. The PromptEngine Chrome extension adds a one-click button right inside the ChatGPT, Gemini and Claude chat boxes. Type a rough draft, click the button, and your prompt is rewritten in place — no copy-pasting back and forth between tabs.
Can I cancel my subscription anytime?
Yes. Pro and Creator subscriptions can be cancelled anytime from your account. There are no long-term contracts, and your account stays on the Free plan after cancellation.
Where does PromptEngine store my prompts?
Prompts are not logged on our servers. Semantic processing happens in your browser. Pro and Creator users can opt to save prompts to their personal prompt history; Free users have no history by design. We do not run third-party advertising and we do not sell your data.
What is the best ChatGPT prompt generator for beginners?
PromptEngine is built for beginners: describe your idea in plain language, pick ChatGPT (or Claude, Gemini, Grok), and get a structured prompt you can paste. Start free with 3 prompts per week—no prompt-engineering course required. See our ChatGPT prompt generator guide.
Is PromptEngine only for ChatGPT?
No. PromptEngine generates model-tuned prompts for ChatGPT, Claude, Gemini and Grok. Browse all prompt guides.
Generate your first prompt
Free to try. No prompt-engineering skills needed.