About the library
Not another prompt cheatsheet. A structured library where every prompt is built like a function, with role, inputs, and expected output format.
Every prompt opens with role assignment ("Act as a Direct Response Copywriter..."), defines explicit variables in brackets ([TARGET AUDIENCE], [OFFER]), and specifies output format (numbered list, markdown table, specific word count). Same prompt, same shape every time.
19 categories from marketing and SEO to legal and HR. Filter by pillar, search by keyword, drill into subcategories like "Viral Hooks" or "Cold Email Outreach". Find what you need in seconds, not minutes.
Edit any prompt to fit your voice. Save your customized version. Export your prompt library. Use it with ChatGPT, Claude, Gemini, or any LLM. No vendor lock-in.
Coverage
From the day-to-day of running a business to the long-tail workflows that take hours of trial and error. Each pillar has multiple subcategories.
Who uses this
You wear every hat. Marketing in the morning, support tickets at noon, contract review in the evening. Prompt OS gives you a structured prompt for whatever you're doing next, so you're not writing the same prompt from scratch every time.
One library, shared across the team. Consistent prompt quality across content, ads, social, and email. Less time explaining how to talk to ChatGPT, more time executing.
Hooks, scripts, thumbnails, descriptions. The YouTube Growth, Visuals, and Copywriting pillars cover the entire content workflow from idea to distribution.
Generic prompts produce generic output. The structure here (specific frameworks, explicit constraints, output format enforcement) is what separates usable AI output from the mush most people generate.
Pricing
No subscription. No tiers. No upsells inside the tool. Pay once, get the full library forever.
Stripe handles payment. License key delivered immediately on the success page.
FAQ
A searchable library of 1,400 professionally engineered prompts for ChatGPT, Claude, Gemini, and other LLMs. Each prompt is structured to produce consistent, high-quality output across 19 business categories.
All 1,343 premium prompts unlocked. Lifetime license. No subscription. Free updates when new prompts are added. The 57 free prompts stay accessible without purchase so you can test the quality first.
Any LLM. The prompts use role assignment, structured input variables, and explicit output formats that work identically across ChatGPT, Claude, Gemini, Llama, Perplexity, Grok. Model-agnostic by design.
Structure. Each prompt opens with a clear role, defines its variables explicitly, sets the output format, and includes a short explanation of why the prompt is designed the way it is. Most free collections are one-line snippets that produce inconsistent output.
Yes. Edit any prompt to fit your voice, your industry, your team. Your customized versions save to local storage and persist across sessions on your browser.
No. Purchase goes through Stripe directly. License key shows up on the success page immediately after payment. No signup required.
Stripe sends a payment confirmation email with your transaction details. Contact support with that email and we'll resend the key.