33rd of 7 in Desktop AI apps
prompt-optimizer
Prompt rewriting and testing tool for web, desktop, Chrome and MCP
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- Stars
- 38k
- License
- custom license
- Last commit
- Oct 2026
- Last release
- Oct 2026
- Language
- TypeScript
24,860 on 25 Mar 202638,004 on 14 Oct 2026
From GitHub's daily star counts.
Checked on GitHub.
Overview
Prompt Optimizer rewrites system and user prompts with an LLM you configure, then lets you test, compare and save the results as versioned favorites. It runs as a browser app, desktop app, Chrome extension or Docker container, and exposes an MCP server at /mcp with optimize-user-prompt, optimize-system-prompt and iterate-prompt tools. Model calls go straight from the client to the provider, including text-to-image and image-to-image modes.
Who it is for: Users who write and iterate on LLM prompts and want a dedicated tool
Strengths
- Ships as web app, desktop app, Chrome extension and Docker image
- Built-in MCP server at /mcp for Claude Desktop and other MCP clients
- Analysis and compare evaluation, variables, multi-turn and function-calling tests
- Client-side processing; requests go directly to the configured provider
Weaknesses
- Web version may hit browser CORS limits with local endpoints such as Ollama
- VITE_* API keys are exposed in browser assets on public deployments
- Chrome Web Store version can lag behind the latest release
- Workspace/project management is still unchecked on the roadmap
What it needs
- no GPU
- Docker + Compose
- Needs LLM provider API key or compatible endpoint
- Models: OpenAI, Gemini, DeepSeek, Grok, Zhipu AI
- port 8081
Head to head
Also in Desktop AI apps
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|---|---|---|
| 1 | cherry-studioCross-platform desktop chat client for many cloud and local LLM providers | 77 out of 100 |
| 2 | deep-live-camReal-time webcam face swap from a single source image | 75 out of 100 |
| #4 | janDesktop app that runs local models or cloud APIs, with a local server | 68 out of 100 |
| #5 | chatboxDesktop and mobile chat client for OpenAI, Claude, Gemini and Ollama models | 65 out of 100 |
| #6 | dsh-desktopNative Windows and macOS desktop client for DeepSeek Harness | 64 out of 100 |