Free Client-Side Tool
AI Prompt Idea Generator
No idea where to start? Pick a category and an AI tool, then generate a random, ready-to-use prompt pulled straight from PromptUp's library of 1,400+ tested prompts. 100% private in your browser.
Generate a random prompt idea
How to use the Prompt Idea Generator
| Step | What to do |
|---|---|
| 1. Narrow by category | Choose Photo edit, Image, Video, or Text & chat — or leave it on "Any category" to browse everything. |
| 2. Narrow by tool (optional) | Pick the AI tool you actually have access to, like ChatGPT, Gemini, Midjourney, or Veo, so the result is one you can run right away. |
| 3. Generate, then re-roll | Hit Generate for a random match. Not feeling it? Hit "Generate another" for a different one from the same filters. |
| 4. Fill in the brackets | Replace any [BRACKETED FIELD] with your own details, then copy the prompt into your AI tool. |
Explore all free prompt tools
Prompt Analyzer
Already have a prompt? Score it against 7 concrete quality signals before you run it.
Open Analyzer →Prompt Optimizer
Turn a generated idea (or your own rough one) into a structured, production-ready prompt.
Open Optimizer →Prompt Converter
Adapt a generated idea's phrasing between ChatGPT, Midjourney parameters, and AI video tools.
Open Converter →Frequently asked questions
How does the Prompt Idea Generator work?
It picks a random prompt from PromptUp's own library of over 1,400 tested prompts, filtered by the category and AI tool you choose. Nothing is invented on the fly; every result is a real, curated prompt card.
Does this tool send any data to a server?
No. The prompt library loads once as a static file and every filter and randomization step runs locally in your browser. No external AI APIs are called.
What do the bracketed words like [SUBJECT] mean?
Bracketed placeholders mark where you should swap in your own details, such as a name, colour, or setting, before pasting the prompt into your AI tool.
Can I browse the full library instead of a random pick?
Yes. Visit All prompts to search and filter the complete library directly.