The latest articles on DEV Community by Jiazong Hou (@houjiazong). https://dev.to/houjiazong https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F2970878%2F9dd94118-8d0e-4930-adc2-bb40d6e8f4ac.jpg https://dev.to/houjiazong en Jiazong Hou Mon, 24 Mar 2025 10:37:15 +0000 https://dev.to/houjiazong/llm-alchemist-a-fast-and-open-source-prompt-testing-tool-8dg https://dev.to/houjiazong/llm-alchemist-a-fast-and-open-source-prompt-testing-tool-8dg <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F3t70y10ijwytre1dnu63.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F3t70y10ijwytre1dnu63.png" alt="Image" width="800" height="384"></a> </p> <p>📌 <strong>GitHub Repo</strong>: <a href="https://github.com/houjiazong/llm-alchemist" rel="noopener noreferrer">LLM Alchemist</a><br><br> 🔗 <strong>Live Demo</strong>: <a href="https://llm-alchemist.vercel.app/" rel="noopener noreferrer">Try It Online</a> </p> <h2> 🔥 Introduction </h2> <p><strong>LLM Alchemist</strong> is a <strong>lightweight, open-source</strong> tool designed to help developers and researchers efficiently evaluate <strong>Large Language Model (LLM) prompts</strong>.<br><br> With <strong>easy-to-use batch testing</strong> and <strong>secure local storage in IndexedDB</strong>, you can quickly analyze prompt performance without compromising data privacy. </p> <p>✨ <strong>Tech Stack</strong>: React + TypeScript + Vite<br><br> 🚀 <strong>Deploy with One Click on Vercel</strong> for instant online access! </p> <h2> ⭐ Key Features </h2> <p>✅ <strong>Batch Prompt Testing</strong>: Test multiple prompts efficiently with ease.<br><br> ✅ <strong>Secure Local Storage</strong>: All configurations are stored safely in <strong>IndexedDB</strong>, ensuring data privacy.<br><br> ✅ <strong>Streaming Response Support</strong>: Get real-time streaming responses directly on the page.<br><br> ✅ <strong>Quick Import/Export</strong>: Easily import and export prompt testing data for better management.<br><br> ✅ <strong>Seamless Vercel Deployment</strong>: Deploy effortlessly with <strong>one click</strong>.<br><br> ✅ <strong>Custom Branding</strong>: Personalize your tool with a custom <strong>logo, name, favicon, and description</strong> (see <code>.env.example</code> for details). </p> <p>If you're looking for a <strong>simple, fast, and efficient</strong> way to test LLM prompts, <strong>LLM Alchemist</strong> is the perfect choice! 🎯</p> <p>Looking forward to your feedback and contributions! 🚀 </p> llm opensource react