Prompt Studio: Locally create, refine, structure, version, and save prompts

Hey Product Hunt! 👋 Creator of Prompt Studio here. I’m incredibly excited to share this with you all today! 🚀 Like many of you, I found myself relying heavily on LLMs for daily workflows, programming, and brainstorming. But as my library grew, my workflow became a mess. I was constantly losing great prompts in random Notion pages, burying them in Apple Notes, or digging through endless ChatGPT/Claude chat histories just to find "that one good prompt structure." Even worse, whenever I wanted to tweak a prompt or test it with a different model, I’d lose the original version entirely. I built Prompt Studio to treat prompts the way they should be treated: like valuable software assets. I wanted a clean, dedicated workspace that lives entirely on my own machine, keeps my data private, and gives me full control over my prompt engineering workflow. Key things you can do with it: 🧠 Structure instantly: Turn messy thoughts into highly reliable frameworks (Role, Objective, Constraints) in one click. ⏳ Track history: Save versions so you can experiment freely without the fear of ruining a working prompt. 📁 Stay organized: Use a familiar, local folder-based structure that fits perfectly into your existing project directories. 🔑 Bring your own key: Fully integrated with OpenRouter so you can test prompts across different models seamlessly. Prompt Studio is built for indie hackers, developers, and AI power users who want to stop rewriting prompts and start building a library that compounds over time.