Prompting Ninja

A fast, local-first prompt library for AI power users

Prompting Ninja is a fast, local-first prompt library built for people who use AI tools every day. Stop hunting through notes, documents, and chat histories for that prompt you wrote last week. Store it once, find it in seconds, use it anywhere. WHAT IT DOES • Store and organise your AI prompts in one place • Search instantly across titles, content, categories, and tags • Copy any prompt to clipboard in one click • Insert prompts directly into ChatGPT, Claude, Gmail/Gemini and standard web inputs • Browse a curated library of 39 ready-to-use prompts across Writing, Analysis, Business, Productivity, and more FEATURES • 11 languages built in - English, Polish, Spanish, Portuguese, Ukrainian, French, German, Italian, Japanese, Chinese, and Arabic with full RTL support • 39 ready-to-use prompts translated into every supported language • Categories and tags for organisation • Favourites and recently used for quick access • Sort by newest, recently used, most used, or title • Dark, light, and system theme support • Import and export your prompt library as JSON • Optional Chrome sync across devices • Keyboard shortcut support • Clean, minimal design PRIVACY FIRST • All data stored locally in your browser • No account required • No analytics or tracking • No external servers • Minimal permissions - only what's needed Prompting Ninja is free and built for speed. If you reuse AI prompts regularly, this will save you time every single day.